Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What you cannot hold but it is yours?

Why 1729 is a magic number? Answer Logically.

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

It belongs to you, but other people use it more than you do. What is it?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?