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

Find the next number in the sequence

5 12 24 36 ?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?