Which number will come next in the given pattern?
3, 6, 9, 12, __
18
15
21
12
Match the number patterns with the rules they follow.
1, 4, 7, 10, ...
90, 85, 80, 75, ...
7, 9, 11, 13, ...
5, 11, 17, 23, ...
80, 70, 60, 50, ...
Adding 3 each time
Subtracting 5each time
Adding 2 each time
Adding 6 each time
Subtracting 10 each time
/\/\/
//\/\
/\/\\