LCM is the multiple of the highest power of prime factors in the numbers. Example: LCM 0f 9 and 25 is 225, which is the multiple of the highest power of prime factors in 9 and 25 (32 x 52).
Since two primes obviously have no common factors greater than 1, you find the least common multiple by multiplying them together. This is true for any pair of numbers with no common factors greater...
You cannot.The numbers 2 and 12 have hcf = 2 and LCM = 12The numbers 4 and 6 also have hcf = 2 and LCM = 12So if you just knew the hcf and LCM you would not know which of the two was the required...
There is insufficient information to answer the question unambiguously.
The two numbers could be any of the following pairs: (7,8), (14,8), (28,8) or (56,8).