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Composite Numbers

The sum of al...

Question

The sum of all those prime numbers which are less than $31$ is

A

119

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B

129

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C

132

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D

137

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Solution

The correct option is B $129$
Prime nos. less than $31$ are
$1, 3, 5, 7, 11, 13, 17, 19, 23, 29$
Sum $= 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 = 129$

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