Question

2 A train has an odd number of cars. The number of cars

is greater than 1 and less than 9.
Part A
How many cars could the train have? List all the possible numbers. Tell whether
each number is prime or composite. Explain how you know,

Answer 1

3, 5, 7 are all possible numbers.

Explanation:

3, 5, and 7 are all prime numbers because you are only able to multiply by 1 and the number itself to come up with those numbers. You cannot multiply two other numbers to come up with the product of 3, 5, and 7.