A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

When we see 2 but call 10?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

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

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

How can you drop a raw egg from a height onto a concrete floor without cracking it?