List questions from arithmetic

Published on 22 Aug 2014 - 21:23

9.1k

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The number $(3+\sqrt{5})^n+(3-\sqrt{5})^n$ is an integer

Published on 23 Aug 2014 - 4:25

35

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How can we generate a $2$-digit number $XY$ on base $B$, such that $BX+Y=Y^X$?

Published on 27 Mar 2026 - 8:42

156

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Why is the result of $-2^2 = -4$ but $(-2)^2 =4$?

Published on 29 Mar 2026 - 12:12

137

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Prove an addition property of Natural numbers

Published on 26 Mar 2026 - 8:03

130

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Compensation Question

Published on 27 Mar 2026 - 0:01

380

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Confused about the $\pm$ sign?

Published on 27 Aug 2014 - 13:26

12.2k

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A hard square root question

Published on 27 Aug 2014 - 15:24

174

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Number of $1$s in the binary representation of $n$

Published on 27 Mar 2026 - 18:26

95

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multiply fraction with what number to get a whole number?

Published on 28 Mar 2026 - 16:28

483

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Is$\frac{\sqrt{a}}{\sqrt{b}}$ the same as $\sqrt{\frac{a}{b}}$?

Published on 28 Mar 2026 - 6:23

652

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How many boys, girls, men and women are there?

Published on 28 Mar 2026 - 22:38

102

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An example of how to solve equation over $\mathbb{Z}$

Published on 30 Mar 2026 - 14:16

457

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Finding a formula for a pattern

Published on 30 Aug 2014 - 12:34

432

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Why isn't the identity $\sqrt{ab}$ = $\sqrt{a} \cdot \sqrt{b}$ always true?

Published on 29 Mar 2026 - 16:29

List Question

How to solve for x in this eq

The number $(3+\sqrt{5})^n+(3-\sqrt{5})^n$ is an integer

How can we generate a $2$-digit number $XY$ on base $B$, such that $BX+Y=Y^X$?

Why is the result of $-2^2 = -4$ but $(-2)^2 =4$?

Prove an addition property of Natural numbers

Compensation Question

Confused about the $\pm$ sign?

A hard square root question

Number of $1$s in the binary representation of $n$

multiply fraction with what number to get a whole number?

Is$\frac{\sqrt{a}}{\sqrt{b}}$ the same as $\sqrt{\frac{a}{b}}$?

How many boys, girls, men and women are there?

An example of how to solve equation over $\mathbb{Z}$

Finding a formula for a pattern

Why isn't the identity $\sqrt{ab}$ = $\sqrt{a} \cdot \sqrt{b}$ always true?

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