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 follow ing numbers will replace the question mark (?) in the given series
 13, 14, 23, 48, 97, 178, ? 

Select the number from among the given options that can replace the question mark (?) in the following series.
 45, 46, 50, 59, 75, ? 

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

97, 131, 165, 199, 233, ?

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

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

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