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

Why do we preferably have round manhole covers and not square ones?

What is always in front of you but can’t be seen?

What can go up a chimney down, but can’t go down a chimney up?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

If we tie a Sheep to one peg, a circled grass is been eaten by the Sheep. If we tie the Sheep to two pegs with a circle on its neck, then an eclipse is eaten out of the grass by the Sheep. If we want an eclipse then we put two pegs and then put a rope in between them and the other end of the rope is tied up on the Sheep's neck.

How should we tie the peg and the Sheep so that a square is eaten out from the garden grass? We only have one Sheep rope and the peg and the rings.

Move three sticks of the spiral below to form a square.

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

What can you deduce from the following BrainBat?

CRY
LMKI

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.