Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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

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

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Replace the question mark with the number below given a simple math problem.

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?