I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I make two people out of one. What am I?

What is the centre of gravity?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Can you count the number of blocks in the picture below?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Solve the following series:
AZ, GT, MN, __, YB

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?