Question

a three digit number 3a5 is added to another 3 digit number 933 to give a four digit number 12b8, which is divisible by 11. then find the value of a+b

Answer 1

3a5+933 =12b8

so we can write this,

12b8 - 933 = 3a5


its only true when a=0 and b=3

therefore, a+b = 3