A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Our product and our sum always give the same answer. Who are we?

Can you solve below mathematical equation?

2^1234 - 2^1233

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?