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 time is it when an elephant sits on a fence?

O_er_t_o_

Complete the missing letters of the given word.

Can you solve below mathematical equation?

2^1234 - 2^1233

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

How can you tell a raw egg from a hard-boiled egg?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What kind of band never plays music?

Which number should replace the question mark?