By the time the child becomes two years old, he/she

If ‘534’ = ‘50’, ‘758’ = ‘138’, ‘3156’ = ‘71, then ‘4738’ = ?

What does "ZK" stands for?

Select the option that is related to the third term in the same way as the second term is related to the first term.

PARENTS : RUMFQBO :: FORESTS : ?

Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster.

If 32 @ 10 = 32 and 42 @ 30 = 76, then 28 @ 56 = '?'.

If 74 × 35 = 2, 35 × 13 = 4, 54 × 42 = 3, then 78 × 44 =? 

Select the option that is related to the fourth number in the same way as the first number is related to the second number.

12 : 96 :: ? : 800