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

Explain how?

There are forty elephants and they have forty-fore heads. How can this be possible?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Can you make a six-letter word using the letters N, A and B ?

What is red and smells like blue paint?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

John is the son of Jacob.
So,
Jacob is the_____of John's father?