find the HCF and LCM 54 90 108 126
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7
Answer:
18
Step-by-step explanation:
90 = 2 * 45 = 2 * 3 * 15 = 2 * 3 * 3 * 5. Since 2, 3, and 5 are prime numbers, they are prime factors of 90.
108 = 2 * 54 = 2 * 2 * 27 = 2 * 2 * 3 * 9 = 2 * 2 * 3 * 3 * 3. So, 2 and 3 are prime factors of 108.
126 = 2 * 63 = 2 * 9 * 7 = 2 * 3 * 3 * 7. So 2, 7, and 3 are the prime factors of 126.
Hence, the HCF of 90, 108 and 126 is 18
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