140, 280, 420, 560, 700
there are 6: 21,28,35,42,49,56
-27
They are: 20, 40, 60, 80, 100 and 120
Multiplies by 3, then subtracts 7
5 10 15 20 25 30
3 and 7 multiplies to 21 and equals to 10
7, 31
the first 5 multiplies of 5 are 5, 10, 15, 20, 25
580
26
20