Solution

153265

Problem / game
Puzzling Place Value Back to problem
First name
Alexander Yuan
School
TTS
Country
Singapore
Age
11

The 4 two digit numbers that the sum of the digits multiplyed by 4 are 12,24,36,48 It is because the tens digit must be half of the units digit and there are no more than these as you can't create another one using only a 2 digit number.