Chapter 4, Problem 2MCQ

To determine

To determine whether the number is prime or composite. If composite, write its prime factorization using exponents

Answer to Problem 2MCQ

57 is a composite number.

Prime factorization $3^1\times {19}^1$

Explanation of Solution

Given information:

Number 57

Calculation:

To determine whether a number is prime or composite, break it down into its factors.

A number is prime if it divisible by only two numbers 1 & itself.

A number is composite if it is divisible by more than two numbers (including 1 & and the number itself)

  $57=3^1\times {19}^1$

As visible, 57 is divisible by 1, 3, 19 & 57. Hence it is composite.

Conclusion-

57 is a composite number.

Prime factorization $3^1\times {19}^1$