Question

# Select the fraction(s) which is/are in its simplest form.

A
511
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B
510
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C
310
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D
39
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Solution

## The correct option is C 310511: Let's rewrite the numerator and the denominator into its factors Factors of 5:1–,5 Factors of 11:1–,11 511 is in the simplest form, because 5 and 11 have no common factors other than 1. 510: Let's rewrite the numerator and the denominator into its factors Factors of 5:1–,5– Factors of 10:1–,2,5–,10 511 is not in the simplest form, because 5 and 10 share common factors of 1 and 5. 310: Let's rewrite the numerator and the denominator into its factors Factors of 3:1–,3 Factors of 10:1–,2,5,10 310 is in the simplest form, because 3 and 10 have no common factors other than 1. 39: Let's rewrite the numerator and the denominator into its factors Factors of 3:1,3 Factors of 9:1,3,9 39 is not in the simplest form, because 3 and 9 share common factors of 1 and 3.

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