The least possible value of k is 7.
The given numbers;
12, 15, 20, k
LCM of 12, 15, 20, k = 420
The prime factor of each of the given is calculated as;
12 = 2² x 3
15 = 3 x 5
20 = 2² x 5
The LCM = 2² x 3 x 5 = 60
The least possible value of k is calculated as;
60k = 420
[tex]k = \frac{420}{60} \\\\k = 7[/tex]
Thus, the least possible value of k is 7.
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