Question 1182377
<pre>
The number N is written “htu”  and has value 100h+10t+u

The digit reversal info leads to  h=t+2
You are also directly given info that tells you
  u  = t+3
  h+t+u = 11

By substituting, this leads to:
(t+2)+t+(t+3) =11
3t + 5 = 11
t = 2  ==> u = 5,  h = 4

The number is 425