What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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 ?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

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

What is harder to catch the faster you run?

A blonde put eyeliner on her head. Why?

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?

What number should come in place of the question mark below?

What is the next shape from answers A, B, C, and D figure?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?