A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Where do fish keep their money?

When can we add 2 to 11 and get 1 as the correct answer?

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

You can see it everyday, But cannot touch it at will. What is it?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?