A maths symbol is hidden in the below Bar Graph. Can you decipher it?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

How is a fly different from a mosquito?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

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

John was drowned by he was not wet. How?

There are two beautiful yet remote islands in the South Pacific. The Islanders born on one island always tell the truth, and the Islanders from the other island always lie.
You are on one of the islands and meet three Islanders. You ask the first which island they are from in the most appropriate Polynesian tongue, and he indicates that the other two Islanders are from the same island. You ask the second Islander the same question, and he also indicates that the other two Islanders are from the same island.
Can you guess what the third Islander will answer to the same question?

Find the next number in the series.
1 10 24 43 67 ?

How can a man go eight days without sleep?