- A8
- B16
- C4
- D15
Step-by-Step Solution
Write them as and with a, co-prime and . Each of the 4 primes goes wholly to a or to ordered ways, so 8 unordered pairs.
Answer: A) 8
Two numbers have HCF 11 and LCM 2310. How many such pairs of numbers are there (order not counted)?
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