One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Prove that twice of ten is the same as twice of eleven.

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

Count the number of balls in picture below: