2, 3, 5, 9, 17, _ What is the next number in the sequence?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

I taste better than I can smell. Who am I?

What has one letter and starts with an E?

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

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

I have an eye but still cannot see.

Who am I?

what one word does the below rebus identifies?

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