Difference between revisions of "Find a Number Problems"
From mispar
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== Find a Perfect Number == | == Find a Perfect Number == | ||
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== Find One Number == | == Find One Number == | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle37a=49</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 37a=49]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle9a=1</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 9a=1]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle13\sdot7\sdot3\sdot a=3</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 13·7·3a=3]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
<div class="mw-collapsible mw-collapsed"><math>\scriptstyle\frac{7a}{9}=49</math><div class="mw-collapsible-content"> | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\frac{7a}{9}=49</math><div class="mw-collapsible-content"> | ||
{{#annotask: | {{#annotask: | ||
| Line 23: | Line 37: | ||
{{#annotask: | {{#annotask: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
| − | [[comment: (a | + | [[comment: (5/a)·8=23]] |
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\frac{\frac{1}{5}a}{\sqrt{a}}=7</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: ⅕a/√a=7]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\frac{3}{a}=5+\frac{7}{b}</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 3/a=5+7/b]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 60: | Line 86: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a+⅓a+⅖a=81]] | [[comment: a+⅓a+⅖a=81]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a+\left[\left(2+\frac{2}{3}\right)\sdot a\right]=11</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a+2⅔a=11]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\left(\frac{1}{2}\sdot a\right)+\left(\frac{1}{3}\sdot a\right)+\left(\frac{1}{4}\sdot a\right)-5=24</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: ½a+⅓a+¼a-5=24]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a+\frac{1}{2}\sdot\left(\frac{1}{4}\sdot a\right)+\left(\frac{3}{4}\sdot a\right)+\frac{1}{4}\sdot\left(\frac{1}{4}\sdot a\right)=2</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a+½¼a+¾a+¼¼a=2]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a+\frac{1}{2}a+\frac{1}{5}a+\frac{1}{7}a=2</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a+½a+⅕a+⅐a=2]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a+\frac{1}{2}\sdot\frac{1}{2}a+\frac{1}{3}\sdot\frac{1}{3}a+\frac{1}{5}\sdot\frac{1}{5}a=7</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a+½½a+⅓⅓a+⅕⅕a=7]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\left(a+\frac{1}{3}a\right)+\left[\frac{2}{5}\sdot\left(a+\frac{1}{3}a\right)\right]+\left[\frac{3}{4}\sdot\left(a+\frac{1}{3}a\right)+\left[\frac{2}{5}\sdot\left(a+\frac{1}{3}a\right)\right]\right]=13</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a+⅓a+⅖(a+⅓a)+¾(a+⅓a+⅖(a+⅓a))=13]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 66: | Line 128: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a-⅓a-¼a=29]] | [[comment: a-⅓a-¼a=29]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\left(\frac{1}{2}a+\frac{1}{3}a\right)-\left(\frac{1}{4}a+\frac{1}{5}a\right)=4</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: (½a+⅓a)-(¼a+⅕a)=4]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 90: | Line 158: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a²·¾a²=6a]] | [[comment: a²·¾a²=6a]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\frac{2}{5}a^2=a</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: ⅖a²=a]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
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[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a+28=2a²]] | [[comment: a+28=2a²]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a^2=4\sdot\left(a+8\right)</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a²=4(a+8)]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a^2=\left(3+\frac{10}{13}\right)\sdot\left(a+6\right)</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a²=(3+¹⁰/₁₃)(a+6)]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
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[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: √(9a)=12]] | [[comment: √(9a)=12]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\sqrt{a}+\sqrt{a-\sqrt{a}}=3</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: √a+√(a-√a)=3]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 126: | Line 218: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: ³/₇a+⁴/₅a=⅔a+¼a+20]] | [[comment: ³/₇a+⁴/₅a=⅔a+¼a+20]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\frac{1}{4}\sdot a=\frac{1}{3}\left[a-\left(\frac{1}{4}\sdot a\right)\right]=\frac{1}{2}\sdot\left[\left[a-\left(\frac{1}{4}\sdot a\right)\right]-\frac{1}{3}\left[a-\left(\frac{1}{4}\sdot a\right)\right]\right]</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: ¼a=⅓(a-¼a)=½((a-¼a)-⅓(a-¼a))]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\left[\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]\right]+\frac{1}{2}\right]\right]-\left[\frac{1}{2}\sdot\left[\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]\right]+\frac{1}{2}\right]\right]+\frac{1}{2}\right]=1</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a-(½a+½)-(½(a-(½a+½))+½)-(½(a-(½a+½)-(½(a-(½a+½))+½))+½)]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 132: | Line 236: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: (3a/4)/4=4/6]] | [[comment: (3a/4)/4=4/6]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle2:3=4:a</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 2/3=4/a]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 144: | Line 254: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a²=40+41\b]] | [[comment: a²=40+41\b]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\frac{4a}{5}=6+\frac{3}{5}</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 4a/5=6⅗]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle4a\bmod5=1</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 4a(mod)5=1]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle4a\bmod6=1</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 4a(mod)6=1]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 156: | Line 284: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a(mod)3=2,a(mod5)=4,a(mod7)=6]] | [[comment: a(mod)3=2,a(mod5)=4,a(mod7)=6]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a\bmod2=1;a\bmod3=1;a\bmod4=1;a\bmod5=0</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a(mod2)=1,a(mod3)=1,a(mod)4=1,a(mod5)=0]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a\bmod2=1;a\bmod3=2;a\bmod4=3;a\bmod5=0</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a(mod2)=1,a(mod3)=2,a(mod)4=3,a(mod5)=0]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a\bmod2=1;a\bmod3=2;a\bmod4=3;a\bmod5=4;a\bmod6=5;a\bmod7=0</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a(mod2)=1,a(mod3)=2,a(mod)4=3,a(mod5)=4,a(mod6)=5,a(mod7)=0]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a\bmod2=1;a\bmod3=1;a\bmod4=1;a\bmod5=1;a\bmod6=1;a\bmod7=0</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a(mod2)=1,a(mod3)=1,a(mod)4=1,a(mod5)=1,a(mod6)=1,a(mod7)=0]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a\bmod1=0;a\bmod2=1;a\bmod3=2;a\bmod4=3;a\bmod5=4;a\bmod6=5;a\bmod7=1</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a(mod)1=0,a(mod2)=1,a(mod3)=2,a(mod)4=3,a(mod5)=4,a(mod6)=5,a(mod7)=1]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a\bmod2=1;a\bmod3=2;a\bmod4=3;a\bmod5=1;a\bmod6=5;a\bmod7=1;a\bmod8=7;a\bmod9=8;a\bmod10=1</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a(mod2)=1,a(mod3)=2,a(mod)4=3,a(mod5)=1,a(mod6)=5,a(mod7)=1,a(mod8)=7,a(mod9)=8,a(mod10)=1]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a\bmod2=0;a\bmod3=2;a\bmod4=0;a\bmod5=0;a\bmod6=2;a\bmod3=1;a\bmod8=4;a\bmod9=5;a\bmod10=0</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a(mod2)=0,a(mod3)=2,a(mod)4=0,a(mod5)=0,a(mod6)=2,a(mod7)=3,a(mod8)=4,a(mod9)=5,a(mod10)=0]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a^2+19=b^2</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a²+19=b²]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle a^2-15=b^2</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a²-15=b²]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\begin{cases}\scriptstyle a+b=n^2\\\scriptstyle a-b=m^2\end{cases}</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a+b=n², a-b=m²]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\begin{cases}\scriptstyle a+4=n^2\\\scriptstyle a-4=m^2\end{cases}</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a+4=n², a-4=m²]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\begin{cases}\scriptstyle a^2-5a=n^2\\\scriptstyle a^2+7a=m^2\end{cases}</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: a²-5a=n², a²+7a=m²]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed">repeated subtraction<div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: repeated subtraction]] | ||
| + | }}</div></div> | ||
== Find Two Numbers == | == Find Two Numbers == | ||
| Line 190: | Line 400: | ||
[[comment: a²=2b+8;a²+b²=80]] | [[comment: a²=2b+8;a²+b²=80]] | ||
}}</div></div> | }}</div></div> | ||
| − | |||
=== b=2a === | === b=2a === | ||
| Line 424: | Line 633: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a/b=⁵/₇;(ab)²=a²√8]] | [[comment: a/b=⁵/₇;(ab)²=a²√8]] | ||
| + | }}</div></div> | ||
| + | <br> | ||
| + | |||
| + | === 8:a:b:27 === | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle8:a:b:27</math><div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: 8/a/b/27]] | ||
}}</div></div> | }}</div></div> | ||
<br> | <br> | ||
| Line 469: | Line 687: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a+¼(b+c)=b+⅙(a+c)=c+⅑(a+b);b=20]] | [[comment: a+¼(b+c)=b+⅙(a+c)=c+⅑(a+b);b=20]] | ||
| + | }}</div></div><br> | ||
| + | |||
| + | == Three Proportional Numbers== | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed">three proportional numbers<div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: three proportional numbers]] | ||
}}</div></div><br> | }}</div></div><br> | ||
| Line 477: | Line 703: | ||
}}</div></div><br> | }}</div></div><br> | ||
| − | == | + | == Four Proportional Numbers== |
| + | |||
| + | <div class="mw-collapsible mw-collapsed">four proportional numbers<div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: four proportional numbers]] | ||
| + | }}</div></div><br> | ||
| + | |||
| + | == Five Proportional Numbers == | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed">five proportional numbers<div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: five proportional numbers]] | ||
| + | }}</div></div><br> | ||
| + | |||
| + | == Six Proportional Numbers == | ||
<div class="mw-collapsible mw-collapsed">six proportional numbers<div class="mw-collapsible-content"> | <div class="mw-collapsible mw-collapsed">six proportional numbers<div class="mw-collapsible-content"> | ||
| Line 483: | Line 725: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: six proportional numbers]] | [[comment: six proportional numbers]] | ||
| + | }}</div></div><br> | ||
| + | |||
| + | == Seven Proportional Numbers == | ||
| + | |||
| + | <div class="mw-collapsible mw-collapsed">seven proportional numbers<div class="mw-collapsible-content"> | ||
| + | {{#annotask: | ||
| + | [[category: #find a number]] | ||
| + | [[comment: seven proportional numbers]] | ||
}}</div></div><br> | }}</div></div><br> | ||
Latest revision as of 14:40, 12 July 2024
Contents
[hide]Find a Perfect Number
[Expand]perfect number
Find One Number
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[Expand]![\scriptstyle a+\left[\left(2+\frac{2}{3}\right)\sdot a\right]=11](/mediawiki/images/math/0/b/0/0b068aee8a198fb1fa58fa1f43e74e36.png)
![\scriptstyle a+\left[\left(2+\frac{2}{3}\right)\sdot a\right]=11](/mediawiki/images/math/0/b/0/0b068aee8a198fb1fa58fa1f43e74e36.png)
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[Expand]![\scriptstyle\left(a+\frac{1}{3}a\right)+\left[\frac{2}{5}\sdot\left(a+\frac{1}{3}a\right)\right]+\left[\frac{3}{4}\sdot\left(a+\frac{1}{3}a\right)+\left[\frac{2}{5}\sdot\left(a+\frac{1}{3}a\right)\right]\right]=13](/mediawiki/images/math/8/3/6/8369d7990f744b9a523db6ca37d54373.png)
![\scriptstyle\left(a+\frac{1}{3}a\right)+\left[\frac{2}{5}\sdot\left(a+\frac{1}{3}a\right)\right]+\left[\frac{3}{4}\sdot\left(a+\frac{1}{3}a\right)+\left[\frac{2}{5}\sdot\left(a+\frac{1}{3}a\right)\right]\right]=13](/mediawiki/images/math/8/3/6/8369d7990f744b9a523db6ca37d54373.png)
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[Expand]![\scriptstyle\left[a-\left(\frac{2}{3}\sdot a\right)\right]^2=20](/mediawiki/images/math/0/2/0/020aa7d4628e7b55eaa289ac0c2211b9.png)
![\scriptstyle\left[a-\left(\frac{2}{3}\sdot a\right)\right]^2=20](/mediawiki/images/math/0/2/0/020aa7d4628e7b55eaa289ac0c2211b9.png)
[Expand]![\scriptstyle\left[a\sdot\left(\frac{2}{3}\sdot a\right)\right]^2=36](/mediawiki/images/math/4/4/d/44d26474e128ec5582fe301dd2b9863a.png)
![\scriptstyle\left[a\sdot\left(\frac{2}{3}\sdot a\right)\right]^2=36](/mediawiki/images/math/4/4/d/44d26474e128ec5582fe301dd2b9863a.png)
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[Expand]![\scriptstyle\frac{1}{4}\sdot a=\frac{1}{3}\left[a-\left(\frac{1}{4}\sdot a\right)\right]=\frac{1}{2}\sdot\left[\left[a-\left(\frac{1}{4}\sdot a\right)\right]-\frac{1}{3}\left[a-\left(\frac{1}{4}\sdot a\right)\right]\right]](/mediawiki/images/math/0/3/3/033d744cd8cb13774b55ad9cacb7de4b.png)
![\scriptstyle\frac{1}{4}\sdot a=\frac{1}{3}\left[a-\left(\frac{1}{4}\sdot a\right)\right]=\frac{1}{2}\sdot\left[\left[a-\left(\frac{1}{4}\sdot a\right)\right]-\frac{1}{3}\left[a-\left(\frac{1}{4}\sdot a\right)\right]\right]](/mediawiki/images/math/0/3/3/033d744cd8cb13774b55ad9cacb7de4b.png)
[Expand]![\scriptstyle\left[\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]\right]+\frac{1}{2}\right]\right]-\left[\frac{1}{2}\sdot\left[\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]\right]+\frac{1}{2}\right]\right]+\frac{1}{2}\right]=1](/mediawiki/images/math/f/2/8/f28c22c40aef6283c27e81473fabdc88.png)
![\scriptstyle\left[\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]\right]+\frac{1}{2}\right]\right]-\left[\frac{1}{2}\sdot\left[\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+\frac{1}{2}\right)\right]\right]+\frac{1}{2}\right]\right]+\frac{1}{2}\right]=1](/mediawiki/images/math/f/2/8/f28c22c40aef6283c27e81473fabdc88.png)
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[Expand]repeated subtraction
Find Two Numbers
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b=2a
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a:b=2:3
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[Expand]![\scriptstyle\begin{cases}\scriptstyle a:b=2:3\\\scriptstyle3a+4b=\sqrt[3]{216}\end{cases}](/mediawiki/images/math/3/7/c/37c574e931d2b293ce8e7c05872dd409.png)
![\scriptstyle\begin{cases}\scriptstyle a:b=2:3\\\scriptstyle3a+4b=\sqrt[3]{216}\end{cases}](/mediawiki/images/math/3/7/c/37c574e931d2b293ce8e7c05872dd409.png)
a:b=3:4
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[Expand]![\scriptstyle\begin{cases}\scriptstyle a:b=3:4\\\scriptstyle\sqrt[3]{2a+3b}=8\end{cases}](/mediawiki/images/math/f/d/f/fdfeea3918f71a57781b72d247caef5c.png)
![\scriptstyle\begin{cases}\scriptstyle a:b=3:4\\\scriptstyle\sqrt[3]{2a+3b}=8\end{cases}](/mediawiki/images/math/f/d/f/fdfeea3918f71a57781b72d247caef5c.png)
a:b=4:5
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a:b=3:5
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[Expand]![\scriptstyle\begin{cases}\scriptstyle a:b=3:5\\\scriptstyle\left[\left(a\sdot\sqrt{a}\right)+\left(b\sdot\sqrt{b}\right)\right]\sdot\sqrt{8}=100\end{cases}](/mediawiki/images/math/7/1/1/71187e61ee927d7bba48ce232ff213cc.png)
![\scriptstyle\begin{cases}\scriptstyle a:b=3:5\\\scriptstyle\left[\left(a\sdot\sqrt{a}\right)+\left(b\sdot\sqrt{b}\right)\right]\sdot\sqrt{8}=100\end{cases}](/mediawiki/images/math/7/1/1/71187e61ee927d7bba48ce232ff213cc.png)
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[Expand]![\scriptstyle\begin{cases}\scriptstyle a:b=3:5\\\scriptstyle a\sdot b=\sqrt[3]{729}\end{cases}](/mediawiki/images/math/0/5/a/05a756d12f1bd790b4653042daf26458.png)
![\scriptstyle\begin{cases}\scriptstyle a:b=3:5\\\scriptstyle a\sdot b=\sqrt[3]{729}\end{cases}](/mediawiki/images/math/0/5/a/05a756d12f1bd790b4653042daf26458.png)
a:b=2:5
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a:b=1:4
[Expand]![\scriptstyle\begin{cases}\scriptstyle a:b=1:4\\\scriptstyle\left(a\sdot b\right)\sdot a=\sqrt[3]{216}\end{cases}](/mediawiki/images/math/1/7/1/171ce646462d735ef90bd02638d35efb.png)
![\scriptstyle\begin{cases}\scriptstyle a:b=1:4\\\scriptstyle\left(a\sdot b\right)\sdot a=\sqrt[3]{216}\end{cases}](/mediawiki/images/math/1/7/1/171ce646462d735ef90bd02638d35efb.png)
a:b=1:3
[Expand]![\scriptstyle\begin{cases}\scriptstyle a:b=1:3\\\scriptstyle\sqrt[3]{a}\sdot\sqrt[3]{b}=100\end{cases}](/mediawiki/images/math/6/b/6/6b684d922156985988350c4b2a4c248d.png)
![\scriptstyle\begin{cases}\scriptstyle a:b=1:3\\\scriptstyle\sqrt[3]{a}\sdot\sqrt[3]{b}=100\end{cases}](/mediawiki/images/math/6/b/6/6b684d922156985988350c4b2a4c248d.png)
a:b=5:7
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8:a:b:27
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Find Three Numbers
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Three Proportional Numbers
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Four Proportional Numbers
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Five Proportional Numbers
[Expand]five proportional numbers
Six Proportional Numbers
[Expand]six proportional numbers
Seven Proportional Numbers
[Expand]seven proportional numbers
שאלה חמשית מהו המספר אשר כפלנו אותו על ל"ז והיוציא מן הכפל יהיה מ"ט
שאלה שביעית מהו המספר שאם כפלנו אותו על ט' והיוציא יהיה אחד
קלג)
נניח שרצינו למצא אי זה כל שקבוץ שלישיתו וחמישיתו יחד הם עשרה
המשל לזה נניח קבוץ אחד משליש ורביע ששוה עשרה וחצי ורצינו לדעת הכל
המשל רצינו למצא מספר שקבוץ שלישיתו ורביעיתו יהיה כ'
המשל רצינו למצא מספר אחד שרביעיתו ושלישיתו יהיה ו'
כמי שישאל על קבוץ רביע וחומש שהם ה' שלימי' ונרצה לדעת הכל כמה הוא
קלו)
שאלה ראשונה מהו המספר
שאלה שנית מהו המומן הנעלם אשר חציו ושלישיתו ורביעיתו פחות חמשה יהיו כ"ד
קלה)
שאלה רציתי למצא מספר כאשר {{#annot: term | #to subtract, #חסר | rg2F}}חסר ממנו{{#annotend:rg2F}} שלישית הנשאר הוא שרש המספר כלו
שאלה רציתי למצא מספר כאשר חסר ממנו שלישיתו מרבע הנשאר הוא מספר כ'
תמצא לי מספר אחד שכאשר הוכה בעצמו ומה שיעלה יוכה ב'''שני שלישיו''' יעשה כמו ו' דמיוני המספר האמור
קנח)
שאילה אם מכפלו של אי זה מספר נקח י"ב ומכפל הנשאר נקח ג"כ י"ב אחרי' וכפל הנשאר יהיה י"ב כמה היה המספר הראשון
אם ישאלך אדם חשבון שהסרות ממנו הי' ומן הנשאר הסרות ממנו העשירית פעם שנית ונשארו ק'![\scriptstyle\left[\left[X-\left(\frac{1}{2}X+1\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+1\right)\right]\right]+1\right]\right]-\left[\left[\frac{1}{2}\sdot\left[\left[X-\left(\frac{1}{2}X+1\right)\right]-\left[\left[\frac{1}{2}\sdot\left[X-\left(\frac{1}{2}X+1\right)\right]\right]+1\right]\right]\right]+1\right]=1](/mediawiki/images/math/b/5/0/b50e38940b92660b687bec29a547c334.png)
שאלה אם תרצה למצא ב' מספרים יעמדו בין ח' ובין כ"ז שיהיה יחס השני אל הראשון כיחס הג' אל הב' וכיחס הד' אל הג'
והנה המשל תמצא לי שלשה מספרים שיהיה חלק הראשון מהשני כמו שהוא ב' מג'