Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?

Find the next number in the series below.

6 18 270 72090 ?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What breaks yet never falls, and what falls yet never breaks?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?