Question

145,120,101,80,65,?,37

Answer 1

145 - 120 = 25    120 - 101 = 19   101 - 80 = 21    80 - 65 = 15     65 - x = y

25 - 19 = 6     19 - 21 = -2  21 - 15 = 6   15 - y = -2

15 + 2 = y   y = 17

65 - x = 17

x = 65 - 17 = 48

Missing number is 48