I’m tall when I’m young, and I’m short when I’m old. What am I?

What has 13 hearts but no other organs?

Why Aeroplane windows are round?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What will you call your mother's brother's brother-in-law?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

A man dies of old age on his 25 birthday. How is this possible?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?