List questions from arithmetic | MathQA

Let $T_n=\{11(k+h)+10(n^k+n^h)\mid1\leq k,h \leq 10\}$ for $n\in\mathbb N$. Find all $n$ such that there is no $a\neq b\in T_n$ with $110 \mid (a-b)$.

Published on 14 Apr 2019 - 3:33

Arithmetic Progression - Find sum

Published on 14 Apr 2019 - 15:29

Increasing point calculation

Published on 14 Apr 2019 - 20:58

Compute $ \lceil{log_2(n)}\rceil $ through basic arithmetic operation

Published on 15 Apr 2019 - 11:01

Are the definitions of addition of natural numbers as cardinals ($|A| + |B| =|A \cup B|$) and by recursion ($a+S(b) = S(a+b)$) related?

Published on 15 Apr 2019 - 14:19

Calculate totals by weighted values

Published on 15 Apr 2019 - 14:27

An inequality with positive integers

Published on 15 Apr 2019 - 19:30

Why isn't $(2x+x^2)^{1/2}$ the same as $(2x)^{1/2}+x$?

Published on 17 Apr 2019 - 21:40

Find it hard to do long division $\frac{10000}{0.08}$

Published on 21 Apr 2019 - 10:07

Given $p_1^{a_1}+ \dots + p_r^{a_r} \leq n$, show that : $r \leq 2\sqrt{\frac{n}{\log(n)}}(1+o(1))$

Published on 21 Apr 2019 - 22:02

Question on ratio

Published on 22 Apr 2019 - 12:29

Are two numbers, $a$ and $b$, uniquely determined by their addition $a+b$ and product $a b$?

Published on 22 Apr 2019 - 19:21

What is the answer to $17^{16} \pmod {10}$? Is it equal to $ 9 $ or $1$

Published on 27 Mar 2026 - 0:06

A thorough explanation on why division by zero is undefined?

Published on 23 Apr 2019 - 14:13

Can roots be thought of as a repeated arithmetic operation?

Published on 24 Apr 2019 - 6:14