Instructions

What will come in place of question mark (?) in the given number series ?

Question 53

8 20 35 54 78 ?

Solution

The pattern is :

8 + $$12$$ = 20

20 + $$12 + 3$$ = 35

35 + $$12 + 3 + 4$$ = 54

54 + $$12 + 3 + 4 + 5$$ = 78

78 + $$12 + 3 + 4 + 5 + 6$$ = 108

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