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?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Find the missing number in the image below.

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?