You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.

Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

There are a hundred statements.

First person says: At least one of the statements is false.

Second person says: At least two of the statements is false.

Third person says: At least three of the statements are false.

Fourth person says: At least four of the statements are false.

..

..

..

Hundredth person says: At least a hundred of the statements are false.

Analysing it, how many statements do you think are false and how many are true?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

What is the next number in the series?

15 29 56 108 208 ?