How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

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

I can be cracked, made, told, and played. What am I?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Solve the puzzle by telling what does below picture means.

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?