Verbal Reasoning - Mental Ability Questions

If 20&60 = 8, 40&80 = 12 and 10&20 = 3, then find the value of 20&50 = ?

Rahul told Anand, 'Yesterday I defeated the only brother of the daughter of my grandmother.' Whom did Rahul defeat 

If 40@8 = 50, 30@3 = 100 and 10@2 = 50, then find the value of 20@5 = ?

A man pointing to a photograph says, 'The lady in the photograph is my nephew's maternal grandmother." How is the lady in the photograph related to the man's sister who has no other sister ?  

In the following question, select the missing number from the given series.

13, 17, 19, 23, 29, ?

In the following question, select the missing number from the given series.

567, 189, 63, ?, 7

MABELA, MABLE, MABUSE, MABEPEARL, ?

If the above given words are arranged in the dictionary then the last word is

Arrange the following words as per order in the dictionary.
1. Situation
2.Silver
3.Sitter
4.Simple
5.Signal