Can you find out the total number of triangles in the given figure?

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

Solve the counting riddle by identifying the number of triangles in the given picture.

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

Where do fish keep their money?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

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

In an office's desk, you find a unique method that shows the current day of the month. Two numbered cubes are used to depict the current date.

Can you find out the numbers on both the cubes so that each date can be mentioned using them?

Please note that you have to use both the cubes to display any date. Thus the 1st day must be represented by 01 and so on.

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?