Tiannatru Tiannatru

15-02-2017
Mathematics

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Which pair of numbers is relatively prime?

A108 and 57
B21 and 183
C55 and 121
D60 and 151

Verified Answer :

Anonymous Anonymous

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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