Question 16

Find the missing number in the following series.4, 7, 12, (…), 28, 39

Solution
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4 + 3 = 7

7 + 5 = 12

12 + 7 = 19

19 + 9 = 28

28 + 11 = 39 

4, 7, 12, 19 , 28, 39

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