What four weights can be used to balance from 1 to 30 pounds?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

What Time Should the last watch show in the below figure?

10+10 and 11+11 can give you the same answer.

Explain how?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

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

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?

How many times in a given day, minutes and hour clock comes in a straight line ?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3