Question

MEDALS GIVEN PLEASE HELP

Question 4 (Multiple Choice Worth 1 points)

[3.01]Which of the following is not true?

3 and 7 are the only prime factors of twenty-one.

The prime factorization of thirty-four is 2 times seventeen.

4 is the only prime factor of sixteen.

The prime factorization of eighteen is 2 times 3 squared.

Question 5 (Multiple Choice Worth 1 points)

[3.01]Which of the following helps you to determine that two hundred seventy-nine is divisible by 9?

seventy-nine is divisible by 9.

2 plus 7 plus 9 is divisible by 9.

The last digit is a 9.

9 is divis

Answer 1

All factors of 21 include, 1, 3, 7 and 21, but only the 3 and 7 prime numbers, meaning that only 1 and their number will divide. ~ So A is correct ~

The Prime Factorization of 34: 2 • 17 ~ So B is correct ~

Answer 2

The Prime Factorization of 18 is 2 x 3 x 3 --> 2 times 3 squared (2 * 3^2) So D is correct ~

Answer 3

4 is the only prime factor of sixteen is INCORRECT
As 2 ~ 4 ~ and 8 are ALL prime factor of sixteen!