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Working backwards from HCF/LCM

GCSE · Mathematics · AQA · N4 — Use vocabulary of primes, factors, multiples; HCF and LCM

Question

(H7) Two numbers have a HCF of 6 and an LCM of 90. One of the numbers is 18. Find the other number.

[Higher tier — challenge]

2 marks · take your time before peeking.

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