There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

In which direction should the missing arrow point?

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

81 x 9 = 801. What must you do to make the this equation true?

what one word does the below rebus identifies?

You can see it everyday, But cannot touch it at will. What is it?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?