Question 30

Find the missing number in the following series.
126, 129, (...), 147, 171

Solution

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126, 129, 135, 147, 171

126 + 3 = 129

129 + 6 = 135

135 + 12 = 147

147 + 24 = 171

here difference of 2 consecutive terms multiplied by 2 to get the difference of next two terms

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