Difference between revisions of "Find a Number Problems"
From mispar
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(→Find One Number) |
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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: | ||
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[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: (5/a)·8=23]] | [[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> | ||
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[[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> | ||
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[[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> | ||
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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> | ||
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[[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> | ||
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[[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> | ||
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[[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> | ||
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[[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> | ||
+ | <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> | }}</div></div> | ||
<br> | <br> | ||
− | <div class="mw-collapsible mw-collapsed"><math>\scriptstyle\begin{cases}\scriptstyle a^2-5a=n^2\\\ | + | <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: | {{#annotask: | ||
[[category: #find a number]] | [[category: #find a number]] | ||
[[comment: a²-5a=n², a²+7a=m²]] | [[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> | }}</div></div> | ||
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[[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> | ||
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[[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 488: | 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 494: | 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)
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[Expand]![\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
[Expand]four proportional numbers
Five Proportional Numbers
[Expand]five proportional numbers
Six Proportional Numbers
[Expand]six proportional numbers
Seven Proportional Numbers
[Expand]seven proportional numbers