Complete the series choosing the missing number:

1, 4, 9, 16, ______

Which of the following numbers will replace the question mark (?) in the given series?
 19, 38, 35, ?, 135, 810

5, 54, 90, 115, 131, 140?

A series is given with one term missing. Choose the correct option from the given ones that will complete the series.

821 460 749 580 701 652 ?

The series given below contains a sequence of numbers. Identify the incorrect combination.
5, 6, 7, 8, 10, 11, 13, 15, 19

Select the letter that can replace the question0a mark (?) in the following series.
K, B, N, D, Q, F, T, H,?

Which letter-cluster will replace the question mark (?) to complete the given series?

AYD, BVF, DRH, ?, KGL

What comes next in the given series?
6C, 10F, 14I, 18L, ?