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Sigma n3

Complete the ...

Question

Complete the following number series by choosing the correct number from the given choices.
$337, 211, 121, ?, 25, 7$

A

41

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B

61

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C

71

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D

81

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Solution

The correct option is A $61$
$7^{3} - 6 = 337$
$6^{3} - 5 = 211$
$5^{3} - 4 = 121$
$4^{3} - 3 = 61$
$3^{3} - 2 = 25$
$2^{3} - 1 = 7$
61 is replace ? mark.
Hence, option 'B' is correct.

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