How many triangles are there on the puzzle below?

I look at you, you look at me I raise my right, you raise your left. What am I?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What do you see in the given picture?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Which number should replace the question mark?