What has many keys but can’t open a single lock?

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?

Our product and our sum always give the same answer. Who are we?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

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

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

What happened when the wheel was invented?

When is the top of a mountain similar to a savings account?