What is the greatest common factor of 42, 30, and 45

Question

What is the greatest common factor of 42, 30, and 45

in progress 0
Maris 5 years 2021-08-26T03:15:41+00:00 2 Answers 11 views 0

Answers ( )

  1. thnahdat
    0
    2021-08-26T03:17:05+00:00
    Reply

    Answer:

    3

    Step-by-step explanation:

    Express the numbers as a product of their primes.

    42 = 2 × 3 + 7

    30 = 2 × 3 × 5

    45 = 3 × 3 × 5

    Identify the prime factors common to all 3 numbers.

    common prime factor = 3 , thus

    GCF = 3

  2. Gerda
    0
    2021-08-26T03:17:39+00:00
    Reply

    Answer: 3

    Step-by-step explanation: The factors of 30 are 1. 2. 3. 5. 6. 10, 15, 30

    The factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42

    The factors of 45 are 1, 3, 5, 9, 15, 45

    As you can see they all share the factors of 1 and 3. Since 3 is the greatest number of the factors all of them share it is the greatest common factor.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )