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

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

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?

Can you count the number of lines in the below picture?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Can you name an animal whose killing cannot be performed without spilling your own blood?

What goes up but never comes down?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?