John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

Rectify the following equality 101 - 102 = 1 by moving just one digit.

What number divided by 4 is the same as that number minus 4?

What has no start, end, or centre?

What kind of storm is always in a rush?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?