What is always in front of you but can’t be seen?

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

How can this be possible?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

I am quite hot but become too cold if you remove the first two letters. What am I?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Can you find the 09 errors in the picture below?

Count the number of balls in picture below: