You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Remove two matchsticks to make the below equation correct.

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

If your uncle’s sister is not your aunt, what relation is she to you?

Can you tell a 3D object that has just two surfaces?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

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?