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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,

15梅3=515梅5=3

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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