__,__,__,48,100,180, 294,448,648,__,__,__,.......Find the three numbers before and after given numbers in the series.

Consider 100 to be the 5th number (rank 5).

Thus the next number is :

The rank of the next number squared (6*6) = 36

multiplied by the rank of the current number 36*5 = 180 

Thus :

1,4 18 is the first 3 and 900,1210 and 1584 the last 3

Posted by Damien on 2005-05-25 06:54:56