List questions from square-numbers

Published on 23 Jun 2015 - 5:41

139

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Find all $n$ such that $n^2+3^n$ is a square number

Published on 24 Jun 2015 - 10:07

788

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Combining sums and/or differences of squares

Published on 28 Mar 2026 - 13:59

66

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Square numbers in the form $1+4y$

Published on 30 Jun 2015 - 20:00

121

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Can a square be in the form $2x + 1$, when $x$ is odd?

Published on 30 Jun 2015 - 20:22

859

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What steps have been taken so far to solve Brocard's Problem?

Published on 26 Mar 2026 - 2:51

173

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How many of the numbers in $A=\{1!,2!,...,2015!\}$ are square numbers?

Published on 17 Jul 2015 - 11:31

16.6k

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If the square of a number is even, then the number is even. Is that true for 2?

Published on 19 Jul 2015 - 18:19

3.1k

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How to solve "$4\sqrt5$ is the same as which square root?"?

Published on 26 Jul 2015 - 12:32

21.8k

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Simplify Square Root Expression $\sqrt{125} - \sqrt{5}$

Published on 27 Jul 2015 - 18:09

5k

Views

Digital Roots of Square Numbers

Published on 28 Jul 2015 - 22:12

112

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This expression is always a perfect square

Published on 30 Jul 2015 - 4:08

46

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Are there infinitely many $k$ for which $\frac{\sigma(k)}{k}$ is a rational square where $ \sigma(k) $ and $k$ both are square?

Published on 29 Mar 2026 - 16:35

34

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Powers of numbers containing negative numbers

Published on 31 Jul 2015 - 4:32

175

Views

Have I just discovered an easy way to square numbers?

Published on 31 Jul 2015 - 20:11

List Question

Are there any primes for which $a^2 = pb^2 + 1$ does not exist?

Find all $n$ such that $n^2+3^n$ is a square number

Combining sums and/or differences of squares

Square numbers in the form $1+4y$

Can a square be in the form $2x + 1$, when $x$ is odd?

What steps have been taken so far to solve Brocard's Problem?

How many of the numbers in $A=\{1!,2!,...,2015!\}$ are square numbers?

If the square of a number is even, then the number is even. Is that true for 2?

How to solve "$4\sqrt5$ is the same as which square root?"?

Simplify Square Root Expression $\sqrt{125} - \sqrt{5}$

Digital Roots of Square Numbers

This expression is always a perfect square

Are there infinitely many $k$ for which $\frac{\sigma(k)}{k}$ is a rational square where $ \sigma(k) $ and $k$ both are square?

Powers of numbers containing negative numbers

Have I just discovered an easy way to square numbers?

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