As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What can jump higher than a building?

Do you know who was buried in John's tomb?

Prove that the below maths equation is true.

8 + 8 = 91

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?