If you say my name, I will no longer exist. What am I?

I add 5 to 9 and get 2. The answer is correct, so what am I?

What has no start, end, or centre?

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

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

John needs to purchase 100 chocolates from three different shops and he has exactly 100 rupees to do that which he must spend entirely. He must buy at least 1 Chocolate from each shop.

The first shop is selling each chocolate at 5 paise, the second is selling at 1 rupee and the third is selling at 5 rupees.

How many chocolates should he buy from each shop?

Can you write down eight eights so that they add up to one thousand?

Count the squares in the matchstick puzzle below?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?