122 LearnersLast updated on May 26th, 2025
Divisibility Rule of 56
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 56.
What is the Divisibility Rule of 56?
The divisibility rule for 56 is a method by which we can find out if a number is divisible by 56 or not without using the division method. Check whether 1232 is divisible by 56 using the divisibility rule.
Step 1: Check if the number is divisible by both 7 and 8, as 56 = 7 × 8.
Step 2: For divisibility by 7, multiply the last digit by 2, and subtract it from the rest of the number. If the result is a multiple of 7, then it is divisible by 7. For 1232, the last digit is 2, so 2 × 2 = 4. Subtract 4 from 123, which gives 119. Since 119 is divisible by 7, 1232 is divisible by 7.
Step 3: For divisibility by 8, check if the last three digits of the number form a number divisible by 8. In this case, 232 is not divisible by 8. Therefore, 1232 is not divisible by 56.
Tips and Tricks for Divisibility Rule of 56
Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 56.
- Know the multiples of 56: Memorize the multiples of 56 (56, 112, 168, 224...etc.) to quickly check the divisibility. If the result from the checks is a multiple of 56, then the number is divisible by 56.
- Use the negative numbers: If the result we get after subtraction is negative, we will avoid 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 56. For example, check if 2352 is divisible by 56. First, check divisibility by 7. The last digit is 2, so 2 × 2 = 4. Subtract 4 from 235, which gives 231. Repeat the process: 231, last digit 1, 1 × 2 = 2, subtract 2 from 23 gives 21. Since 21 is divisible by 7, 2352 is divisible by 7. Then check divisibility by 8: 352 is divisible by 8. Therefore, 2352 is divisible by 56.
- 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 56
The divisibility rule of 56 helps us to quickly check if the given number is divisible by 56, but common mistakes like calculation errors lead to incorrect conclusions. 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: check divisibility by both 7 and 8.
Mistake 2
Including the last digit in subtraction when checking for 7.
Students should keep in mind to 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 a large result after subtraction. The process should be repeated until we get the smallest number that is divisible by both 7 and 8.
Mistake 4
Not considering the negative values.
Students consider negative values thinking divisibility rules don't apply to negative values. But divisibility rules are 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 them. To avoid this error, students should practice regularly.
Divisibility Rule of 56 Examples
Problem 1
Is the number of students in a class, 168, divisible by 56?
Yes, 168 is divisible by 56.
Explanation
To check if 168 is divisible by 56, we can use the divisibility rule:
1) First, check the divisibility of 168 by both 8 and 7 (since 56 = 8 x 7).
2) For 8, the last three digits of 168 are 168, and 168 ÷ 8 = 21, so it's divisible by 8.
3) For 7, follow the rule: Multiply the last digit by 2, 8 × 2 = 16. Subtract from the rest, 16 – 16 = 0.
4) Since the result is 0, 168 is divisible by 7.
5) As 168 is divisible by both 8 and 7, it is divisible by 56.
Problem 2
A bakery produces 224 cookies, determine if this number is divisible evenly among 56 friends.
Yes, 224 is divisible by 56.
Explanation
To determine if 224 is divisible by 56, we check its divisibility by both 8 and 7.
1) For 8: The last three digits are 224, and 224 ÷ 8 = 28, so it's divisible by 8.
2) For 7: Multiply the last digit by 2, 4 × 2 = 8. Subtract from the rest, 22 – 8 = 14.
3) Since 14 is a multiple of 7, 224 is divisible by 7.
4) As 224 is divisible by both 8 and 7, it is divisible by 56.
Problem 3
Can a shipment of 448 items be divided into packages of 56 items each without leftovers?
Yes, 448 is divisible by 56.
Explanation
Check the divisibility of 448 by 8 and 7.
1) For 8: The last three digits are 448, and 448 ÷ 8 = 56, so it's divisible by 8.
2) For 7: Multiply the last digit by 2, 8 × 2 = 16. Subtract from the rest, 44 – 16 = 28.
3) Since 28 is a multiple of 7, 448 is divisible by 7.
4) Thus, 448 is divisible by both 8 and 7, making it divisible by 56.
Problem 4
A concert venue has 300 seats. Can they arrange the seats into blocks of 56?
No, 300 is not divisible by 56.
Explanation
Check divisibility by 8 and 7.
1) For 8: The last three digits are 300, and 300 ÷ 8 = 37.5, which is not an integer, so it's not divisible by 8.
2) Without needing to check further, since 300 is not divisible by 8, it cannot be divisible by 56.
Problem 5
A farmer has 560 apples. Can he distribute them equally in baskets of 56 apples each?
Yes, 560 is divisible by 56.
Explanation
Verify divisibility by 8 and 7.
1) For 8: The last three digits are 560, and 560 ÷ 8 = 70, so it is divisible by 8.
2) For 7: Multiply the last digit by 2, 0 × 2 = 0. Subtract from the rest, 56 – 0 = 56.
3) Since 56 is a multiple of 7, 560 is divisible by 7.
4) Therefore, 560 is divisible by both 8 and 7, confirming it is divisible by 56.
FAQs on Divisibility Rule of 56
1.What is the divisibility rule for 56?
2.How many numbers are there between 1 and 100 that are divisible by 56?
3.Is 112 divisible by 56?
4.What if I get 0 after subtraction?
5.Does the divisibility rule of 56 apply to all integers?
6.How can children in Vietnam use numbers in everyday life to understand Divisibility Rule of 56?
7.What are some fun ways kids in Vietnam can practice Divisibility Rule of 56 with numbers?
8.What role do numbers and Divisibility Rule of 56 play in helping children in Vietnam develop problem-solving skills?
9.How can families in Vietnam create number-rich environments to improve Divisibility Rule of 56 skills?
Important Glossaries for Divisibility Rule of 56
- Divisibility rule: The set of rules used to find out whether a number is divisible by another number or not. For example, a number is divisible by 56 if it is divisible by both 7 and 8.
- Multiples: Multiples are the results we get after multiplying a number by an integer. For example, multiples of 56 are 56, 112, 168, etc.
- Integers: Integers are numbers that include all whole numbers, negative numbers, and zero.
- Subtraction: Subtraction is a process of finding the difference between two numbers by reducing one number from another.
- Verification: The process of confirming the result by cross-checking with another method, such as direct division.
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About BrightChamps in Vietnam
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.
