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8 November, 14:39

Can some one do these two i will put 20 pts

What is the GCF of 8 and 32?

2

4

8

32

What is the LCM of 20 and 40?

5

10

20

40

+5
Answers (2)
  1. 8 November, 14:44
    0
    gcf = 8 lcm = 5

    gcf means greatest common facter. 8 goes into 8 1 time and 32 4 times. therefor 8 is the gcf. lcm means least common multiple. and 5 is the lowest number that goes into 20 and 40
  2. 8 November, 14:50
    0
    For the first question, the right answer is 8.

    for the second question, the right answer is 40

    Step-by-step explanation:

    First of all, we need to find the GCF of 8 and 32, for that we need to find the factors of 8 and 32

    Factors of 8 are:

    8=1, 2, 4, 8.

    Factors of 32 are=

    32 = 1, 2, 4, 8, 16, 32

    we can see that 1, 2, 4 and 8 are factors for the two numbers, but 8 is the greatest of these numbers, so the greatest common factor for 8 and 40 is 8.

    Now we just need to find the LCM of 20 and 40 we need to find their multiples

    Multiples of 20=

    20: 20, 40, 60, 80, 100, 120

    Multiples of 40=

    40: 40,80, 120, 160, 200

    We can see that 40, 80 and 120 are common multiples but the lowest one is the LCM

    So the LCM of 20 and 40 is 40
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