Which number will replace the question mark (?) in the following number series?
 5, 4, 6, 15, 56, ?

Select the number from among the given options that can replace the question mark (?) in the following series.
 5, 10, 17, 26, 37, 50, ?

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

1, 22, 44, 67, 91, ?

Which number from the options will replace the question mark (?) in the following series?
 2, 4, 8, 32, 256, ?

Directions: Find the wrong number in the following number series:

4, 5.1, 7.3, 10.6, 15, 20, 27.1

Select the set in which the numbers are related in the same way as are the numbers of the following sets.

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding /deleting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

(3, 6, 18) (5, 7, 35)

Directions: Find the wrong number in the following number series:

251, 252, 254, 227, 243, 118, 154

Select the number from among the given options that can replace the question mark (?) in the following series.
 121, 144, 169, ?, 225, 256