You may also like

problem icon

More Mods

What is the units digit for the number 123^(456) ?

problem icon

Days and Dates

Investigate how you can work out what day of the week your birthday will be on next year, and the year after...

problem icon

Mod 3

Prove that if a^2+b^2 is a multiple of 3 then both a and b are multiples of 3.

Transposition Fix

Stage: 4 Challenge Level: Challenge Level:1
Look for a case where it fails and if you can't find one try to find a general proof.