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

What has to be broken before you can use it?

Why do we preferably have round manhole covers and not square ones?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

What is both possible and impossible at the same time?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

Count the number of triangles in the given picture.

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99