Complete the following series.
ZIP, WIP, TIP, ?.

Select the square-set best represented by the following Venn diagram.

How many pair of letters are there in the word “EFFECTIVE” which has as many letters (in both forward and backward direction) in between as they have in English alphabet series?

In each of the following questions, a series is given, with one term missing. Choose the correct alternative from the given one that will complete the series.
2, 3, 9, 49, ?, 3841

Sushant said "This girl is the wife of the grandson of my mother. How is Sushant to the girl? 

Find the missing number from the given responses.

In a certain code language Sue Re Nik means She is brave, Pi Sor Re Nik means She is always smiling and Sor Re Zhi means Is always cheerful. What is the code used for the word “smiling”?