[Mrtnst]

What comes next in this series?​

1, 2, 6, 12, 60, 420, 840, ?

 

[Mrtnst]

Answer:

Spoiler

2520

Explanation:

This is the series of the smallest numbers evenly divisible by the ascending sequence numbers from 1 to 1..8.

1 is divisible by 1
2 by 1 & 2
6 by 1, 2 & 3 or 1..3
(6 can also be divided by itself, but this isn't relevant because it is not divisible by 4 or 5.)
12 by 1..4
60 by 1..6
420 by 1..7
840 by 1..8

The required number is smallest number that is divisible by 1..9, which is 2520 that is also divisible by 10

2520 by 1..10

 

[Wandiwa]

Wow, thanks for the head scratcher, no wonder nobody got it.

This dude woulda worked it out!

 

[Mrtnst]

I stole it from him.