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Formula for Sum of n Terms of an AP

In each of th...

Question

In each of the following questions there is a series with one term missing as shown by (?) Choose one alternative among he four alternatives given below to complete the series
840, 168, 42, 14, 7, ?

A

12

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B

16

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C

7

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D

9

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Solution

The correct option is C 7
The pattern is $\div 5 \div 4 \div 3 \div 2 \div 1$ Hence the next term would be $7 \div 1 = 7$ The pattern is $\div 5 \div 4 \div 3 \div 2 \div 1$ Hence the next term would be $7 \div 1 = 7$

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