List questions from divisibility | MathQa

Efficient way to check if large number is divisible by 3

Published on 12 Jan 2025 - 8:44

Only prime numbers $a$ (and $1$) have the property that $a\mid bc$ implies $a\mid b$ or $a\mid c$

Published on 12 Jan 2025 - 23:34

Divisibility proof with co-prime numbers

Published on 12 Jan 2025 - 8:44

Prove that if 2 divides $x^2-5$ then 4 divides $x^2-5$

Published on 12 Jan 2025 - 8:44

Number Theory Homework: Find 3 consecutive integers...

Published on 12 Jan 2025 - 8:44

Prove divisibility: if $a\mid (b-d)$ and $a\mid (c-e)$, then $a\mid (bc-de)$

Published on 12 Jan 2025 - 8:44

Divisibility of a series

Published on 12 Jan 2025 - 23:34

Why test of divisible by $12$ works with $3$ and $4$ but not with $2$ and $6 ?$

Published on 12 Jan 2025 - 8:43

If $x$ divides $x-z$, then $x$ divides $z$

Published on 12 Jan 2025 - 23:29

why is $6$ divided by $1245=207.5$ ?instead of $207$ remainder $3$?

Published on 12 Jan 2025 - 23:34