How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

What have one eye but still cannot see?

Which country gets ill every time?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

What is the largest number you can write with just 3 digits?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?