Ivan Shishkin, Rye (1878)

Problems

87 problems / 21 domains

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Showing 87 problems

35

A necessary condition to be prime ?

Number theory · 1 solved · Unreviewed

arithmetic
by Sequoia
1
34

Gcd of two Mersenne numbers

Number theory · 0 solved · Reviewed

arithmeticgcd
by Sequoia
0
17

About tall people issues

Number theory · 0 solved · Unreviewed

arithmetics
by Sequoia
0
09

Five in a square

Combinatorics · 1 solved · Reviewed

by Sequoia
1
26

Forest tournament

Combinatorics · 0 solved · Reviewed

by Sequoia
0
20

Two equations with integer functions

Differential equations · 1 solved · Reviewed

functional equationintegers
by Sequoia
0
12

Quick exercise on set theory

Set theory · 1 solved · Unreviewed

intersectionset theoryunion
by Sequoia
0