HCF & LCM · Question 20 · Easy
Which of the following pairs of numbers is co-prime?
- (14, 21)
- (16, 36)
- (15, 28)
- (27, 45)
Answer and explanation
Answer: C. (15, 28)
Explanation: Co-prime numbers have HCF 1. HCF(15, 28) = 1, whereas (14, 21) share 7, (16, 36) share 4 and (27, 45) share 9.
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