Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Why Aeroplane windows are round?

Can you find out the missing number in the grid?

Can you count the number of squares in the given picture?

If we tie a Sheep to one peg, a circled grass is been eaten by the Sheep. If we tie the Sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the Sheep. If we want an eclipse then we put two pegs and then put a rope in between them and the other end of the rope is tied up on the Sheep's neck.

How should we tie the peg and the Sheep so that a square is eaten out from the garden grass? We only have one Sheep rope and the peg and the rings.

A Monkey, a squirrel, and an Eagle are racing to the top of the mango tree. Assuming all these animals are in perfect shape, Which animal will reach to Banana first?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?