Okay, I have a slight hunch about what story this is (To Build a Fire by Jack London?) and if so, then D
✡ If we have 3 boxes and 9 classes, you divide ✡
✡Therefore 3 classes can get a box. ✡
Pattern A (add 5)
First term is 1 so, add 5 to 1, for the 2nd term, keeping adding 5 to the values you find from previous
1 + 5 = 6
6 + 5 = 11
11 + 5 = 16
16 + 5 = 21
1, 6, 11, 16, 21
Pattern B ( minus 4)
First term is 28, so minus 4 to get a value, now take 4 from the value & so on...
28 - 4 = 24
24 - 4 = 20
20 - 4 = 16
16 - 4 = 12
28, 24, 20, 16, 12
Hope this helps!
