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?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

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

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

Can you find out which options fits best with the missing column?

Replace the question mark with the correct number in below Picture:

John is the son of Jacob.
So,
Jacob is the_____of John's father?

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

The more of this there is, the less you see. What is it?