28 If numbers are relatively prime (no common factor other than 1), just multiply them to get the L.C.M. If the are not relatively prime, then decompose them into prime factors, and find the number got by multiplying those exponents.
The LCM of the numbers 4, 7, and 8 is 56.
If there is no common factor greater than 1, then the lcm of those numbers is the product of those numbers. eg hcf(5, 7) = 1 → lcm(5, 7) = 5 x 7 = 35 eg hcf(4, 9) = 1 → lcm(4, 9) = 4 x 9 = 36
The LCM is: 84
LCM: 56
The LCM of the given numbers is 532
The LCM of 3, 4, and 7 is 84, which is the multiple of the highest power of prime factors from both numbers (2 x 2 x 3 x 7 = 84).
It is: 84
They can be 4 and 7
Two numbers that have an LCM of 28 are 14 and 28.
The LCM of these numbers is 364. LCM is Least Common Multiple.
The required number if lcm(2,3,4,7,9) + 1, where lcm(2,3,4,7,9) is the least common multiple of the numbers in the brackets. lcm(2,3,4,7,9)= lcm(4,7,9) = 4*7*9 = 252. So the answer is 253.
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