The sum of the digit of A three digit number is 20 .the middle digit is equal to one fourth the sum of the other two. If the order of the digi be reversed the number increases the original number by woo .find the original number

Answer 1

If the number is abc, then you are told

a+b+c = 20
b = (a+c)/2
100c+10b+a = 100a+10b+c + woo

Now just solve for a,b,c

Answer 2

749