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?

Can you find out the missing number in the grid?

I add 5 to 9 and get 2. The answer is correct, so what am I?

What does below Rebus mean ?

esgg sgeg gegs gsge

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

What does does this rebus picture means ?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

why number 8549176320 is one of a kind?