Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

what does this picture(rebus) riddle means ?

What word begins and ends with an E, but has only one letter?

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?

What do you answer even though it never asks you questions?

How can you make number one disappear by adding something to it?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.