In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you make four (4) nines (9) equal 100?

How many letters are in the alphabet?

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.

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?