If it took eight men ten hours to build a wall, how long would it take four men to build it?

What has no start, end, or centre?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

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

What does it mean?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

Can you decipher the two rows to find the hidden word?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?