Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

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

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

The more you take me, the more you leave me behind.
Who Am I?