Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

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.

Can you fill the blank with the correct number?

6 30 870 756030 _____

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?

Which digit occurred maximum times between the number 1 and 1000?

Why do Chinese men eat more rice than Japanese men do ?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

What is the riddle which can be asked all day with a different correct answer each time.