Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

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?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

What has one letter and starts with an E?

You need to remove two matchsticks to make the below equation true. Can you do it ?

What goes through cities and fields, but never moves?

What English word has three consecutive double letters?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

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?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?