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Questions Tagged with "elementary number theory"

Explore solved questions tagged with "elementary number theory" or help others by answering their unsolved questions related to "elementary number theory".

Positive integer solutions to $frac{1}{a} + frac{1}{b} = frac{c}{d}$

3 answer

Mathematics Asked 2 years ago

Proving Euler’s Totient Theorem

3 answer

Mathematics Asked 2 years ago

Sum $sum_{(k_1, k_2, k_3): k_1+k_2+k_3=K, ,, n_1+n_2+n_3=N}k_1^{n_1}times k_2^{n_2} times k_3^{n_3}$

0 answer

Mathematics Asked 2 years ago

Find all integer values of $a$ such that $a^2 - 4a$ is a perfect square

3 answer

Mathematics Asked 2 years ago by hardik-ddod

When is $sum_{i=1}^{m}i^n =0 bmod dfrac{m(m+1)}{2}$?

0 answer

Mathematics Asked 2 years ago

One number is removed from the set of integers from $1$ to $n.$ The average of the remaining numbers is $163/4.$ Which integer was removed?

4 answer

Mathematics Asked 2 years ago by Drich1002

Establishing divisibility by a prime

1 answer

Mathematics Asked 2 years ago

Chinese Remainder Theorem for moduli that are not necessarily pairwise coprime

1 answer

Mathematics Asked 2 years ago

Solve $x^2+3y = u^2$ and $y^2+3x=v^2$ in positive integers.

2 answer

Mathematics Asked 2 years ago by The Demonix _ Hermit

How to check if $phi(n)$ is a perfect square?

0 answer

Mathematics Asked 2 years ago by ppSpp

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