A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Name a key which is hardest to turn.

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

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?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?