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

What is the next number in this series?

4,12,84,3612....

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

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?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?