Posted by Gon on Thursday, September 27, 2012 at 1:23am.
It is less than 300. The ones digit is 4 times the hundreds digit. The tens digit is 5 more than the hundreds digit. The sum of the digits is 17. What is the mystery number?

Math  PsyDAG, Thursday, September 27, 2012 at 10:35am
Let hundreds digit = x, then tens = x+5 and ones digit = 4x.
x + (x+5) + 4x = 17
Caculate for x, then x+5 and 4x.