self Maths Puzzle

18:30::36:?
A 54 B 62
C 64 D 66

Read Solution (Total 6)

self Other Question

A & B together can complete the work in 30 days.If after working for 4 days, they take the help of C and D on each alternate days and manage to complete the work in 9 days.If D is twice as efficient as C. In how many days D alone can complete the work ? 2+4+6=16
3+5+7=55
4+5+6=?