Why is a river so rich ?

What is the end of everything?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

Using eight eights and addition only, can you make 1000?

What you cannot hold but it is yours?

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

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

When it is alive we sing, when it is dead we clap our hands. What is it?

How can you leave a room with two legs and return with six legs?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?