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What is the LCM (least common multiple) of 2 and 7

User Davidnagli
by
4.4k points

2 Answers

5 votes

Answer: 14

Explanation:

The greatest common multiple of 2 and 7 is 1, because they are both prime numbers (numbers that cannot be divided by anything other than one or themselves).

Why bother with the greatest common multiple?

There's a very sneaky formula you can do to calculate the LCM with this.


lcm(a, b) = (|a * b|)/(gcd(a, b))

where lcm(a, b) = the least common multiple of integers a and b (1)

a = integer a (2)

b = integer b (7)

gcd(a, b) = greatest common divisor of integers a and b

So let's use it, we have all the available numbers.


lcm(a, b) = (|2 * 7|)/(1) = 14

User Chubbsondubs
by
4.4k points
4 votes

Answer:

14

Explanation:

User Alexander Pranko
by
5.1k points