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?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

Which number comes next in the number series?

2, 9, 30, 93, ?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Can you make four (4) nines (9) equal 100?

In the picture given below, can you find out which digit will take place of the question mark?