Question 730791
The sum of the digits of a three-digit number is 15. The ones digit is one less than the tens digit. The hundreds digit is two less than the tens digit. What is the number.
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let u=units digit
let t=tens digit
let h=hundreds digit
..
u=t-1
h=t-2
u+t+h=15
t-1+t+t-2=15
3t=18
t=6
h=t-2=4
u=t-1=5
number:100h++10t+u=400+60+5=465