The smallest number which is a common multiple of both 7 and 4 is 28.
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The least common multiple of 2, 4, and 7 is 28. Two is a factor of 4, so we can ignore it, and 7 is prime, so the LCM is 4 x 7 = 28.
The least common multiple of 4 , 5 , 3 , 7 = 420
28. 2 is a multiple of 4. so take 4*7 and that is 28.It is: 28
The lowest common multiple of 5 and 7 is 35.
since 7 and 26 has no common factors (anyway, 7 is a prime number, and 26, on the other hand, is a composite number w/o 7 as a possible factor, nevermind this line if it confuses you ) the smallest common multiple will be 7*26. any other multiple will just be a natural number times the lowest common multiple (7*26)