What is the fastest way to double your money?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

What is the coolest letter in the alphabet?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you replace the question mark with the correct number in the below table sequence?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1