3, 7, 9
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The LCM of 9 and 21 is 63, which is the multiple of the highest power of prime factors from both numbers, is 63. (3² x 7 = 3 x 3 x 7 = 63).
The LCM of 36 and 63 is 252. To find the LCM, find the prime factorization of both numbers. The prime factorization of 36 is 3*3*2*2 The prime factorization of 63 is 3*3*7 3*3*2*2*7=252
Since 63 is a multiple of 9, it is automatically the LCM.
The least common multiple for 7 and 9 is 63.
The LCM is: 630just multiply 90*63 and what i do is go google and look up least common multiple calculator and there you have different options and pick the one that best fits your answer