If one whole number is divisible by another number, then the second number is a factor of the first number. Since 18 is divisible by 9, 9 is a factor of 18. A divisibility test is a rule for determining whether one whole number is divisible by another. It is a quick way to find factors of large numbers.
Answers & Comments
Answer:
If one whole number is divisible by another number, then the second number is a factor of the first number. Since 18 is divisible by 9, 9 is a factor of 18. A divisibility test is a rule for determining whether one whole number is divisible by another. It is a quick way to find factors of large numbers.