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RRB NTPC 18 January 2017 Paper
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© examsnet.com
Question : 1
Total: 120
Find out which of the following sets form co-prime numbers.
(12, 7)
(21, 42)
(3, 9)
(43, 129)
Validate
Solution:
(1) We can observe that in option(1), 12 and 7 do not have any common factor other than 1. So, set (12, 7) forms co-prime numbers.
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