Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

What am I?

What is at the end of a rainbow?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What goes up but never comes down?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

How can I get the answer 24 by only using the numbers 8,8,3,3?

You can use the main signs add, subtract multiply and divide.

Can you make a six-letter word using the letters N, A and B ?