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

If STRICTURE is coded as TSUTCIRER, then how would INCULCATE be coded?

Which of the following numbers will replace the question mark (?) in the given series?
 14, 14, 12, 36, 32, 160, ?

In a certain code language, 'COMPUTER' is written as 'RETUCOMP' and 'LAPTOP' is written as 'POTLAP'. How will 'BOTTLE' be written in that language?

Select the option that represents the correct order of the given words as they would appear in an English dictionary.
 1. Vantage
 2. Wherefore
 3. Uplift
 4. Various
 5. Variety
 6. Valor

Select the option that is related to the fifth term in the same way as the second term is related to the first term and fourth term related to third term.
 9 : 270 :: 15 : 450 :: 13 : ?

The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs EXCEPT one. Find that odd number pair.

Which letter-cluster will replace the question mark (?) to complete the given series?
 ZFOE, PYUA, FRAW, VKES, ?