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?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

What number should come in place of the question mark below?

What's the best place to go shopping in the ocean?

Find out the number of circles in the given picture having Illusion

What does this mean?

CCCCCCC

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?