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

173 151 130 110 91 ?

A64

B78

C73

D56

Answer:

C. 73

Read Explanation:

Series: 173, 151, 130, 110, 91, ?

Differences നോക്കാം:

173151=22173 - 151 = 22

151130=21151 - 130 = 21

130110=20130 - 110 = 20

11091=19110 - 91 = 19
Pattern: subtracting 22, 21, 20, 19

Next step:

9118=7391 - 18 = 73

Final Answer:
73\boxed{73}


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