If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

The centre of the third figure is empty. What digit should fit inside?

Solve this riddle by finding the odd one out from the rest.