Question

A rule was used to make the given pattern: 51, 45, 39, 33, 27, 21…What could be the rule used to make the pattern?​

Answer 1

Answer:

= 15

Step-by-step explanation:

51 - 6 = 45

45 - 6 = 39

39 - 6 = 33

33 - 6 = 27

27 - 6 = 21

Finally :

21 - 6 = 15