Interview Maths Puzzle Numerical Ability Alligation or Mixture

if '56' stands '26f' and '82' stands '39b' then '66' stands for??
1)28 f
2)31f
3)34e
4)31e

Read Solution (Total 2)

Interview Other Question

What is the sum of the squares of the first 20 natural numbers(1 to 20)? ad+a+b=259
bc+b+c=220
ac+a+c=339
what will be a+b+c?