If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

How is a fly different from a mosquito?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Why is Saturday stronger than Monday?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What's the best place to go shopping in the ocean?

What number divided by 4 is the same as that number minus 4?

What has a bottom at the top?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

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?