Solution

26308

Problem / game
Three neighbours Back to problem
First name
Malavika
School
OFS
Country
Singapore
Age
12

The totals always gets added by 6 if you take the largest of the three consecutive numbers and write two more for that one.
for example:
1, 2, 3 = 6
3, 4, 5 = 12
5, 6, 7 = 18

and so forth!