SOLUTION: 12,24,21,42,39,78..... find the next no.

Algebra ->  Sequences-and-series -> SOLUTION: 12,24,21,42,39,78..... find the next no.      Log On


   

Question 979982: 12,24,21,42,39,78..... find the next no.
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
next number is 78 - 3 = 75