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

Which is faster, Heat or Cold ? Explain.

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

When it is alive we sing, when it is dead we clap our hands. What is it?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

what's the probability of getting a king or a queen from a pack of 52 cards?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?