Prove that twice of ten is the same as twice of eleven.

Can you solve this picture maths equation?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What can you deduce from the following BrainBat?

CRY
LMKI

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?