Question 91

Complete the series.
148, 150, 156, 168, (…)

Solution

148, 150, 156, 168, (…)

first difference

$$150 - 148 = 2$$

$$156 - 150 = 6$$

$$168 - 156 = 12$$

second difference

6 - 2 = 4

12 - 6 = 6

so next should be 8

12 + 8 = 20

now add 20 to 168

168 + 20 = 188

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