You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Find out the number of circles in the given picture having Illusion

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

What's the only room from which no one can enter or leave

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?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

Take one out and scratch my head, I am now black but once was red. What am I?

People put me on the table and cut me but do not eat me. What am I?