A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

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?

What is the largest number you can write with just 3 digits?

What does does this rebus picture means ?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

What Does this text mean:

important=important

Eight of us go fourth, not back, to protect our king from an attack. What are we?