Tiannatru Tiannatru

15-02-2017
Mathematics

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Which pair of numbers is relatively prime?
A. 108 and 57
B. 21 and 183
C. 55 and 121
D. 60 and 151

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Аноним Аноним

19-02-2017

its not A because 108 and 57 are both divisible by 3

if you write the numbers in prime factor form you will see the correct optiuon

for example B:-

21 = 3* 7
183 = 3 * 61 3 is common to both factors so its not B

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