When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Find the next number in the series.
1 10 24 43 67 ?

You need to arrange three 7 and mathematical symbols to form number 1?

I am sure no one can have two things for dinner. what are they?

Katniss and Peeta are liars. They both lie on some specific days.

Katniss lies on Fridays, Saturdays and Sundays. She speaks the truth on all other days.

Peeta lies on Tuesdays, Wednesdays and Thursdays. He speaks the truth on all other days.

Can you tell that one day of the week when both of them will say "Tomorrow, I will lie."?

How many triangles are there in the picture below?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?