Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Joseph buys three kinds of chocolates for 100 rupees. The first one is priced at 5 rupees, second one at 3 rupees and third one at 0.5 rupees.

If he bought 100 chocolates in total, how many pieces do you think he bought each chocolate?

81 x 9 = 801. What must you do to make the this equation true?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

What is the word or phrase below?
R | E | A | D

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

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?

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

What number do you get when you multiply all of the numbers on a telephone's number pad?