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