If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Can you name some countries which do not have the alphabet 'A' in them?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

What is common among 11, 69, and 88?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

What runs around the whole yard without moving?