You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Why is 6 afraid of 7?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

Where do fish keep their money?

What is the largest number you can write with just 3 digits?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

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.

I make two people out of one. What am I?