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The prime factor tree for 390 is shown below:

Draw the prime factor tree for 42 and use it to work out the highest common factor (HCF) of 42 and 390.

390

195

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01:03

Find the prime factorization of each number.$$42$$

00:20

Find the prime factorization of the number.$$42$$

01:01

Find the prime factorization of each number. If the number is prime, state this.$$40$$

01:15

$a$. List all the factors of 42 .b. What is the greatest common factor of 42 and 15 ?c. What is the greatest common factor of 42 and 50 ?

01:07

Write each number as a product of prime factors.$$42$$

Transcript

This problem says the prime factor: try for 390 is shown, and we want to draw the prime factor, try for 42 and use it to work out the highest common factor of the h c, f of 4590 point and before we get to 42 pi. When we see our prime factor try for 390 point, we see our prime numbers are 235 and 13 point. So that’s the prime factorization of this number we’ll do the same thing for 42 and then compare our prime factorization for 42 will start off by breaking it. To 2 and 21 and 2 is already a prime number, so we can…

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