How many sides does a circle have?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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 ?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

What kind of tree can you carry in your hand?

Can you solve below mathematical equation?

2^1234 - 2^1233

Can you count the number of triangles in the given picture?

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?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

What has a bottom at the top?