One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What does it mean?

Count the number of triangles in the picture below:

Can you move 2 matchsticks to form four equal sized squares.

An explorer goes on an exposition in the jungle. He sets up camp in the middle of the jungle. The next morning he sees something with a head and a tail, but he is not afraid. What did he see in his bag?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Guess the hidden movie name?

I travel all around the world but always stay in the corner. What am I?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?