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

Explain how?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

There are three cows, two dogs, and one cat: How many legs do you have?

Three friends named Mr. Black, Mr. Yellow and Mr. Green enter a pub on a weekend night. They are wearing either a Black, Yellow or Green shirt.

Mr. Yellow says to them, 'Did you notice that we all are wearing different color shirts than our names?'

To this, the man who was wearing the Green shirt said. 'Wow, thats right.'

Can you identify who is wearing which colour shirt ?

What occurs twice in a week, once in a year but never in a day?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

why number 8549176320 is one of a kind?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.