What is the lcm of 25 and 80?

Answer 1

To find the LCM of two numbers, you first break them into their prime factors. In this case, we have 25 and 80, which are broken down into:

25 = 5x5

80 = 2x2x2x2x5

The next step is to identify any common factors. Both numbers have a 5 as a prime factor, so we can discard one of these. That leaves us with 5, 5, 2, 2, 2 and 2. Multiply all these together:

2x2x2x2x5x5 = 400

Thus the LCM of 25 and 80 is 400.