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Problem
#PRU-32110
Problems
Number Theory
Numeral systems
Decimal number system
Divisibility
Division with remainders. Arithmetic of remainders
Division with remainder
Methods
Pigeonhole principle
Pigeonhole principle (other)
12–14
4.0
Problem
Reception pupil Peter knows only the number 1. Prove that he can write a number divisible by 1989.
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