What will you call your mother's brother's brother-in-law?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

What can you catch but never throw?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Find out the missing number in the picture attached:

What is the Surname of Barbie Doll?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?