I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What is the next number in this series?

4,12,84,3612....

Can you move 2 matchsticks to form four equal sized squares.

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

Why is it against the law for a man living in Delhi to be buried in Mumbai?