Which is faster, Heat or Cold ? Explain.

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

Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

There is a place where if I stand up straight, I will still be considered sideways.

I look at you, you look at me I raise my right, you raise your left. What am I?

Make a sentence consisting of three words that have the whole alphabet.