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Pre-algebra

Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff

$Math Studyset Vaia Explanations$ Math

Common Core Edition · 183 pages

ISBN: 9780547587776

Chapter 4: Q8. (page 174)

Tell whether the number is prime or composite. 15

Short Answer

Expert verified

15 is a composite number.

Step by step solution

01

.Recall the concept of prime and composite numbers

Prime numbers are the numbers which are divisible by 1 and itself.

Composite numbers are the numbers which have factors other than 1 and itself.

02

Step-2- Find the factors of the given number

Observe that,

$\begin{array}{l} 15 \div 3 = 5 \\ 15 \div 5 = 3 \end{array}$

Therefore, the factors of 59 are 1, 3, 5 and 15.

03

. Conclusion

Since 15 has factors other than 1 and itself, it is a composite number.

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Most popular questions from this chapter

Find the greatest common factors of the monomials. $18 c, 4 c$

Describe how to write the prime factorization of a number.

Copy and complete the factor tree. Then write the prime factorization of the number.

Which numbers are not relatively prime?

$32, 65$
$34, 69$
$63, 91$
$26, 85$

Write the prime factorization of the number.

58

See all solutions

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