MathDB

175

Part of 1973 All Soviet Union Mathematical Olympiad

Problems(1)

ASU 175 All Soviet Union MO 1973 9-digit perfect square does not end in 5

Source:

7/4/2019
Prove that 99-digit number, that contains all the decimal digits except zero and does not ends with 55 can not be exact square.
number theoryPerfect Square9-digit