Question

how to check that a number is prime or composite ?​

Answer 1

Answer:

Here's how you know which tests to perform:

If a number less than 121 isn't divisible by 2, 3, 5, or 7, it's prime; otherwise, it's composite.

If a number less than 289 isn't divisible by 2, 3, 5, 7, 11, or 13, it's prime; otherwise, it's composite

Answer 2

Answer:

Check that it does come in more than 2 tables

Step-by-step explanation:

1. 3×2=6 six comes in table 2 and table three so it is a composite number

2- 7×1=7 seven is a number that does not come in any table except its own, so it is a prime number

hope it helped