How do you do this problem in 8th grade

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Evaluate the expression. (9 + 5)(3 + 2)0