188 LearnersLast updated on May 26th, 2025
Divisibility Rule of 709
The divisibility rule is a way to find out whether a number is divisible by another number without using the division method. In real life, we can use the divisibility rule for quick math, dividing things evenly, and sorting things. In this topic, we will learn about the divisibility rule of 709.
What is the Divisibility Rule of 709?
The divisibility rule for 709 is a method by which we can find out if a number is divisible by 709 or not without using the division method. Let's check whether 2127 is divisible by 709 with the divisibility rule.
Step 1: Multiply the last digit of the number by 9, here in 2127, 7 is the last digit, multiply it by 9. 7 × 9 = 63
Step 2: Subtract the result from Step 1 from the remaining numbers but do not include the last digit. i.e., 212–63 = 149.
Step 3: As it is shown that 149 is not a multiple of 709, therefore, the number is not divisible by 709. If the result from step 2 is a multiple of 709, then the number is divisible by 709.
Tips and Tricks for Divisibility Rule of 709
Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 709.
Know the multiples of 709:
Memorize the multiples of 709 (709, 1418, 2127, ... etc.) to quickly check divisibility. If the result from the subtraction is a multiple of 709, then the number is divisible by 709.
Use the negative numbers:
If the result we get after the subtraction is negative, we will ignore the symbol and consider it as positive for checking the divisibility of a number.
Repeat the process for large numbers:
Students should keep repeating the divisibility process until they reach a small number that is divisible by 709. For example: Check if 4253 is divisible by 709 using the divisibility test. Multiply the last digit by 9, i.e., 3 × 9 = 27. Subtract the remaining digits excluding the last digit by 27, 425–27 = 398. Still, 398 is a large number, hence we will repeat the process again and multiply the last digit by 9, 8 × 9 = 72. Now subtracting 72 from the remaining numbers excluding the last digit, 39–72 = -33. As -33 is not a multiple of 709, 4253 is not divisible by 709.
Use the division method to verify:
Students can use the division method as a way to verify and cross-check their results. This will help them to verify and also learn.
Common Mistakes and How to Avoid Them in Divisibility Rule of 709
The divisibility rule of 709 helps us to quickly check if the given number is divisible by 709, but common mistakes like calculation errors lead to incorrect results. Here we will understand some common mistakes and how to avoid them.
Mistake 1
Not following the correct steps.
Students should follow the correct steps that are multiplying the last digit with 9 and then subtracting the result from the remaining digits excluding the last digit and checking whether it is a multiple of 709.
Mistake 2
Including the last digit in subtraction.
Students should keep in mind that they should exclude the last digit while subtracting and include all the remaining digits.
Mistake 3
Not repeating the process when the result is large.
Students often stop the process after they have obtained a large number after subtraction. The process should be repeated until we get the smallest number that is divisible by 709.
Mistake 4
Not considering the negative values.
Students consider the negative values thinking divisibility rules don't apply to negative values. But the divisibility rule is applicable for negative values too. So students should consider the negative values as positive while checking for divisibility.
Mistake 5
Confusing the steps.
Students often confuse the steps or forget the steps, to avoid the error students should practice regularly.
Divisibility Rule of 709 Examples
Problem 1
Is 2127 divisible by 709?
Yes, 2127 is divisible by 709.
Explanation
To determine if 2127 is divisible by 709, we need to follow the divisibility process unique to 709.
1) Multiply the last digit of the number by 3, 7 × 3 = 21.
2) Subtract the result from the remaining digits excluding the last digit, 212 – 21 = 191.
3) Check if 191 is divisible by 709. No, it's not, but since we need to apply the rule repeatedly:
4) Continue the process: 1 × 3 = 3, subtract from 19, 19 – 3 = 16, which is clearly not divisible by 709.
Therefore, 2127 is indeed divisible by 709 (709 x 3 = 2127), but our steps did not confirm it due to incorrect assumptions, a reminder to verify by division.
Problem 2
Check the divisibility rule of 709 for 4254.
No, 4254 is not divisible by 709.
Explanation
To check the divisibility rule of 709 for 4254:
1) Multiply the last digit of the number by 3, 4 × 3 = 12.
2) Subtract the result from the remaining digits, excluding the last digit, 425 – 12 = 413.
3) Check if 413 is divisible by 709. It's not a multiple of 709.
Thus, 4254 is not divisible by 709.
Problem 3
Is -6381 divisible by 709?
Yes, -6381 is divisible by 709.
Explanation
To determine if -6381 is divisible by 709, we first remove the negative sign and check 6381.
1) Multiply the last digit by 3, 1 × 3 = 3.
2) Subtract the result from the remaining digits, 638 – 3 = 635.
3) Since this step didn't help, divide 6381 directly by 709 to confirm: 6381 ÷ 709 = 9, an exact division.
Therefore, -6381 is divisible by 709.
Problem 4
Can 1000 be divisible by 709 following the divisibility rule?
No, 1000 isn't divisible by 709.
Explanation
To check if 1000 is divisible by 709 using the rule:
1) Multiply the last digit by 3, 0 × 3 = 0.
2) Subtract from the remaining digits, 100 – 0 = 100.
3) 100 is not divisible by 709.
Therefore, 1000 is not divisible by 709.
Problem 5
Check the divisibility rule of 709 for 1418.
Yes, 1418 is divisible by 709.
Explanation
To verify if 1418 is divisible by 709:
1) Multiply the last digit by 3, 8 × 3 = 24.
2) Subtract from the remaining digits, 141 – 24 = 117.
3) Since 117 isn't a clear multiple of 709, check division: 1418 ÷ 709 = 2, showing an exact division.
Therefore, 1418 is divisible by 709.
FAQs on Divisibility Rule of 709
1.What is the divisibility rule for 709?
2.How many numbers are there between 1 and 1000 that are divisible by 709?
3.Is 1418 divisible by 709?
4.What if I get 0 after subtracting?
5.Does the divisibility rule of 709 apply to all integers?
6.How can children in Oman use numbers in everyday life to understand Divisibility Rule of 709?
7.What are some fun ways kids in Oman can practice Divisibility Rule of 709 with numbers?
8.What role do numbers and Divisibility Rule of 709 play in helping children in Oman develop problem-solving skills?
9.How can families in Oman create number-rich environments to improve Divisibility Rule of 709 skills?
Important Glossaries for Divisibility Rule of 709
- Divisibility rule: A set of rules used to find out whether a number is divisible by another number or not. For example, a number is divisible by 2 if the number ends with an even digit.
- Multiples: Multiples are the results we get after multiplying a number by an integer. For example, multiples of 709 are 709, 1418, 2127, ...
- Integers: Integers are numbers that include all the whole numbers, negative numbers, and zero.
- Subtraction: Subtraction is the process of finding the difference between two numbers by reducing one number from another.
- Verification: Verification is the process of confirming whether the result obtained is correct, often using an alternative method such as direct division.
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About BrightChamps in Oman
Hiralee Lalitkumar Makwana
About the Author
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
Fun Fact
: She loves to read number jokes and games.
