180 LearnersLast updated on May 26th, 2025
Divisibility Rule of 397
The divisibility rule is a way to determine whether a number is divisible by another number without performing the division operation. In real life, we can use the divisibility rule for quick math, dividing things evenly, and sorting items. In this topic, we will learn about the divisibility rule of 397.
What is the Divisibility Rule of 397?
The divisibility rule for 397 is a method by which we can ascertain if a number is divisible by 397 without performing the division directly. Check whether 15881 is divisible by 397 using the divisibility rule.
Step 1: Multiply the last digit of the number by 17. In 15881, 1 is the last digit, so multiply it by 17. 1 × 17 = 17.
Step 2: Subtract the result from Step 1 from the remaining part of the number, excluding the last digit. That is, 1588 - 17 = 1571.
Step 3: Repeat the process for the result if necessary. For 1571, multiply the last digit (1) by 17, 1 × 17 = 17. Subtract from the remaining digits 157 - 17 = 140.
Step 4: Continue the process if necessary, but for this example, since 140 is not divisible by 397, 15881 is not divisible by 397.
Tips and Tricks for Divisibility Rule of 397
Learning the divisibility rule helps kids master division. Let’s learn a few tips and tricks for the divisibility rule of 397.
- Know the multiples of 397: Memorize the multiples of 397 (397, 794, 1191, 1588, etc.) to quickly check divisibility. If the result from the subtraction is a multiple of 397, then the number is divisible by 397.
- Use the negative numbers: If the result after subtraction is negative, consider its absolute value for checking divisibility.
- Repeat the process for large numbers: Students should keep repeating the divisibility process until they reach a small number that is divisible by 397 or can clearly determine divisibility.
- 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 confirm their findings and also learn.
Common Mistakes and How to Avoid Them in Divisibility Rule of 397
The divisibility rule of 397 helps us quickly check if a given number is divisible by 397, but common mistakes like calculation errors can 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 involve multiplying the last digit by 17 and then subtracting the result from the remaining digits, excluding the last digit, and checking whether it is a multiple of 397.
Mistake 2
Including the last digit in subtraction.
Students 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 obtaining a large number as a result after subtraction. The process should be repeated until reaching the smallest possible number that is divisible by 397.
Mistake 4
Not considering the negative values.
Students should consider the absolute value of negative results, as divisibility rules apply regardless of sign.
Mistake 5
Confusing the steps.
Students often confuse or forget the steps. To avoid errors, students should practice regularly.
Divisibility Rule of 397 Examples
Problem 1
Can the number 2382 be divided evenly by 397?
Yes, 2382 is divisible by 397.
Explanation
To determine if 2382 is divisible by 397, follow these steps:
1) Divide the number by 397 directly: 2382 ÷ 397 = 6.
2) The division results in a whole number with no remainder, indicating that 2382 is divisible by 397.
Problem 2
Is 1588 divisible by 397?
Yes, 1588 is divisible by 397.
Explanation
To verify if 1588 is divisible by 397, perform the following:
1) Divide the number by 397: 1588 ÷ 397 = 4.
2) The result is a whole number with no remainder, confirming that 1588 is divisible by 397.
Problem 3
Check if 1191 is divisible by 397.
No, 1191 is not divisible by 397.
Explanation
To check divisibility:
1) Divide 1191 by 397: 1191 ÷ 397 = 3.
2) The result is not a whole number (with a remainder), indicating 1191 is not divisible by 397.
Problem 4
Can the number -794 be evenly divided by 397?
Yes, -794 is divisible by 397.
Explanation
To check if -794 is divisible by 397, disregard the negative sign:
1) Divide 794 by 397: 794 ÷ 397 = 2.
2) The result is a whole number with no remainder, showing that -794 is divisible by 397.
Problem 5
Is the number 2985 divisible by 397?
No, 2985 is not divisible by 397.
Explanation
To determine divisibility:
1) Divide 2985 by 397: 2985 ÷ 397 ≈ 7.52.
2) The result is not a whole number, which means 2985 is not divisible by 397.
FAQs on Divisibility Rule of 397
1.What is the divisibility rule for 397?
2.How many numbers are there between 1 and 10000 that are divisible by 397?
3.Is 794 divisible by 397?
4.What if I get 0 after subtracting?
5.Does the divisibility rule of 397 apply to all integers?
6.How can children in Qatar use numbers in everyday life to understand Divisibility Rule of 397?
7.What are some fun ways kids in Qatar can practice Divisibility Rule of 397 with numbers?
8.What role do numbers and Divisibility Rule of 397 play in helping children in Qatar develop problem-solving skills?
9.How can families in Qatar create number-rich environments to improve Divisibility Rule of 397 skills?
Important Glossary for Divisibility Rule of 397
- Divisibility rule: A set of rules used to determine if a number is divisible by another number without performing division.
- Multiples: The results obtained after multiplying a number by an integer. For example, multiples of 397 are 397, 794, 1191, etc.
- Integers: Numbers that include all whole numbers, negative numbers, and zero.
- Subtraction: A mathematical process of finding the difference between two numbers by reducing one from the other.
- Absolute value: The non-negative value of a number without regard to its sign.
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About BrightChamps in Qatar
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.
