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?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Move three sticks of the spiral below to form a square.

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

What jumps when it walks and sits when it stands?

By what process could you make a 'Tea-Table' into food?

I have feet, but no legs. Which animal Am I?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?