Move four matchsticks to the below square to form three squares?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

Find the next number in the sequence

5 12 24 36 ?

I have branches, but no fruit, trunk or leaves. What am I?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Move three sticks of the spiral below to form a square.

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

In the picture given below, can you find out which digit will take place of the question mark?