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.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Can you find out the number that should replace the question mark with a valid reason?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?