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Prime Factorisation

The sum of pr...

Question

The sum of prime factors of 1575 is _____.

A

23

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B

25

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C

27

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D

20

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Solution

The correct option is A 23
Prime factorization of 1575:

$1575 = 5 \times 5 \times 3 \times 3 \times 7$
The factors are 5, 5, 3, 3, 7
$∴$ The sum of prime factors $= 5 + 5 + 3 + 3 + 7 = 23$

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