Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

When we see 2 but call 10?

What is the difference between a jeweller and a jailer?

The LCD device should be able to tell the right time in the format HH:MM: SS in a 12-hour format. You can refer to the picture to get an idea. The device is a simple "level indicator" which has to be converted into a watch. How will you program it to work?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

What has no start, end, or centre?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?