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

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

What does a man do only once in his lifetime, but women do once a year after they are 29?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

The more you take me, the more you leave me behind.
Who Am I?

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

Find the 8 in the below-given Image.