What does it mean?

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?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Can you divide the below-given shape into four equal and identical pieces?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

What can jump higher than a building?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?