What goes up but never comes down?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

You need to remove two matchsticks to make the below equation true. Can you do it ?

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

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?