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

The series given below contains a sequence of numbers. Ident ifythe incorrect combination.
2, 15, 41, 80, 134

Which of the following numbers will replace the question mark (?) in the given series?

29, 33, ?, 113, 369

Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
 XUR, WTQ, VSP, URO, ? 

Which of the following numbers will replace the question mark (?) in the given series?

1, 3, 6, 18, 36, 108,?

Which of the following numbers will replace the question mark (?) in the given series?

121, 169, 289, ?, 529, 841

Which of the following numbers will replace the question mark (?) in the given series?
 11, 20, 43, 94, 187, 336, 555, ? 

Which of the following numbers will replace the question mark (?) in the given series?

26, 54, 110, 222, ?,  894