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Knocker379
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11
Let $z$ be a complex number. The number $1$ is written on a board. You perform a series of moves. When can you make terms tend to $0$?
Nov 30, 2021
5
Is $1/3$ and/or $-17$ in the set of integers modulo $7$?
Jul 15, 2021
5
For how many $n$ is $2021^n$ + $2022^n$ + $2023^n$ + ... + $2029^n$ prime?
Sep 7, 2021
4
Average distance of 2 points on distinct lines
May 29, 2022
3
Prove that $12(x) \bmod 5 = 1$ has solutions at $x = 5n + 3$ [duplicate]
Jul 7, 2021
3
Prove that values of $x$ in $19x + 34y = 1,$ repeat in a period of $34.$
Jul 15, 2021
2
N-Quarters in a circle, remove either one each turn, or two tangent coins each turn. Whoever takes the last quarter loses.
Jul 13, 2021
1
Limits Confusion
Dec 1, 2021
1
You have seen that $ \int_0^{\infty} f(t) e^ {-t}dt $ = $ \int_0^{\infty} f'(t) e^ {-t}dt $ is sometimes true. Find some non-polynomial examples
May 24, 2022
1
Concatenating consecutive numbers to find primes?
Sep 29, 2023