What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

Find out the missing number in the picture attached:

When can we add 2 to 11 and get 1 as the correct answer?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

Can you count the number of matches in the picture below ?

Who always enjoys poor health?