Select the numbers that can replace the question marks (?) in the following series.
36, 49, 51, 39, 53, 54, 42, 57, 57, 45, ?, ?

In the given series, 36, 49, 51, 39, 53, 54, 42, 57, 57, 45, ?, ?, 

If we consider three consecutive numbers 36,49,51 as one set, 39,53,54 as one set and so on..

first position numbers in each set i.e.., 36,39,42,45, are increasing by a value of 3.

second position numbers in each set i.e.., 49,53,57, are increasing by a value of 4. therefore, next number would be 61.

third position numbers in each set i.e.., 51, 54, 57 are increasing by a value of 3. therefore, next number would be 60.

Therefore, correct answer is 61,60