List questions from discrete-mathematics

Published on 13 Apr 2026 - 19:37

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Mean Absolute Error (MAE) equal or more than 1.

Published on 13 Apr 2026 - 19:39

57

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Find a $\tau(6n)$, if $\tau (2n)=28$ and $\tau (3n)=30$

Published on 10 Apr 2026 - 23:11

61

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Prove that number $4p^2+1$ can show as sum of squares of three different numbers

Published on 14 Apr 2026 - 2:29

299

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If $2n+1$ and $3n+1$ are perfect squares, then prove that $8|n$.

Published on 14 Apr 2026 - 0:01

73

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Calculate $\sum_{k=1}^{2007} \frac{5^{2008}}{25^k+5^{2008}}$

Published on 13 Apr 2026 - 14:46

90

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Solve congruence $x^2+x+9\equiv 0 \pmod{63}$

Published on 27 Mar 2026 - 1:46

74

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Let , and be sets. Prove formally that | ∪ ∪ | = || + || + || − | ∩ | − | ∩ | − | ∩ | + | ∩ ∩ |

Published on 26 Mar 2026 - 6:33

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Nets of Dice - how to know if it is a Nets of Dice

Published on 25 Mar 2026 - 18:57

2.1k

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How to find Standard Deviation, given Mean and Cumulative Normal Distribution?

Published on 12 Apr 2026 - 3:59

169

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Ordered set vs any set (minimal element and minimum)

Published on 22 Nov 2018 - 15:55

41

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Why is this relation antisymmetric?

Published on 13 Apr 2026 - 22:02

86

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What does it mean by leading contribution in error calculation?

Published on 10 Apr 2026 - 0:38

99

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Prove that $\frac{n}{3}+\frac{n^2}{3}+\frac{n^3}{6}$ is natural number

Published on 27 Mar 2026 - 1:47

36

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For a set M with x ∈ M being the only minimal element on that set, is x the least element as well? Show your answer for finitie and infinite set M.

Published on 22 Nov 2018 - 22:36

List Question

How can I Find the size of each of the following sets

Mean Absolute Error (MAE) equal or more than 1.

Find a $\tau(6n)$, if $\tau (2n)=28$ and $\tau (3n)=30$

Prove that number $4p^2+1$ can show as sum of squares of three different numbers

If $2n+1$ and $3n+1$ are perfect squares, then prove that $8|n$.

Calculate $\sum_{k=1}^{2007} \frac{5^{2008}}{25^k+5^{2008}}$

Solve congruence $x^2+x+9\equiv 0 \pmod{63}$

Let , and be sets. Prove formally that | ∪ ∪ | = || + || + || − | ∩ | − | ∩ | − | ∩ | + | ∩ ∩ |

Nets of Dice - how to know if it is a Nets of Dice

How to find Standard Deviation, given Mean and Cumulative Normal Distribution?

Ordered set vs any set (minimal element and minimum)

Why is this relation antisymmetric?

What does it mean by leading contribution in error calculation?

Prove that $\frac{n}{3}+\frac{n^2}{3}+\frac{n^3}{6}$ is natural number

For a set M with x ∈ M being the only minimal element on that set, is x the least element as well? Show your answer for finitie and infinite set M.

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