What is the next number in this series?

4,12,84,3612....

If two's company, and three's a crowd, then whats four and five ?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

What is the next number in the series?

15 29 56 108 208 ?

Using eight eights and addition only, can you make 1000?

Why do you find that most of the buildings are deprived of the 13th floor?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What is next number in the pattern below:

131 517 192 123 ?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?