What is the rule for the pattern, 117, 102, 87, 72, 57? Select two answers.
The pattern is:
117 - 15 = 102,
102 - 15 = 87,
87 - 15 = 72,
72 - 15 = 57.
So the rule is subtracting 15 from each number.
Or, alternately,
117 - 81 = 36,
102 - 66 = 36,
87 - 51 = 36,
72 - 36 = 36,
57 - 21 = 36.
So the rule is subtracting 36 from each number.