10+10 and 11+11 can give you the same answer.

Explain how?

What does does this rebus picture means ?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What is common among 11, 69, and 88?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

What jumps when it walks and sits when it stands?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What two things can you never eat for breakfast?