208 LearnersLast updated on May 26th, 2025
Divisibility Rule of 251
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 251.
What is the Divisibility Rule of 251?
The divisibility rule for 251 is a method by which we can find out if a number is divisible by 251 or not without using the division method. Check whether 75351 is divisible by 251 with the divisibility rule.
Step 1: Multiply the last digit of the number by a certain factor. For 251, this factor is 26. In 75351, 1 is the last digit, multiply it by 26. 1 × 26 = 26.
Step 2: Subtract the result from Step 1 from the remaining values but do not include the last digit. i.e., 7535 - 26 = 7509.
Step 3: Repeat the process with the new number (7509) if necessary. Since 7509 is still a large number, repeat the process. The last digit is 9, 9 × 26 = 234. Subtract from the remaining number, 750 - 234 = 516.
Step 4: Since 516 is still large, continue the process. The last digit is 6, 6 × 26 = 156. Subtract from 51, 51 - 156 = -105.
Step 5: Since the result is negative, take the absolute value, 105. Repeat the process again with 105. The last digit is 5, 5 × 26 = 130. Subtract from 10, 10 - 130 = -120.
Step 6: Take the absolute value again, which is 120. Since 120 is not a multiple of 251, the original number is not divisible by 251.
Tips and Tricks for Divisibility Rule of 251
Learning the divisibility rule will help kids to master division. Let’s learn a few tips and tricks for the divisibility rule of 251.
- Know the multiples of 251: Memorize or have a list of multiples of 251 for quick reference. This helps in quickly checking divisibility.
- Use the negative numbers: If the result after subtraction is negative, consider it as positive for checking the divisibility of a number.
- Repeat the process for large numbers: Continue the divisibility process until you reach a small number that is clearly divisible or not divisible by 251.
- Use the division method to verify: Use the division method to verify and cross-check results. This helps in learning and confirming the divisibility.
Common Mistakes and How to Avoid Them in Divisibility Rule of 251
The divisibility rule of 251 helps us quickly check if a given number is divisible by 251, but common mistakes like calculation errors can lead to incorrect conclusions. Here we will understand some common mistakes and how to avoid them.
Mistake 1
Not following the correct steps.
Follow the correct steps of multiplying the last digit by 26 and then subtracting from the remaining digits, excluding the last digit.
Mistake 2
Including the last digit in subtraction.
Exclude the last digit when subtracting and include only the remaining digits.
Mistake 3
Not repeating the process when the result is large.
Continue the process until you reach a manageable number.
Mistake 4
Not considering negative values.
Consider negative values as positive when checking for divisibility.
Mistake 5
Confusing the steps.
Practice regularly to remember the steps and avoid errors.
Divisibility Rule of 251 Examples
Problem 1
Is 753 divisible by 251?
Yes, 753 is divisible by 251.
Explanation
To check if 753 is divisible by 251, we need to follow the divisibility rule; however, there isn't a simple rule like for 7, so we perform direct division: 753 ÷ 251 = 3. Since the result is an integer, 753 is divisible by 251.
Problem 2
Check the divisibility of 502 for 251.
Yes, 502 is divisible by 251.
Explanation
To determine if 502 is divisible by 251, we apply direct division: 502 ÷ 251 = 2. The division results in an integer, confirming that 502 is divisible by 251.
Problem 3
Is 1004 divisible by 251?
Yes, 1004 is divisible by 251.
Explanation
We check the divisibility of 1004 by 251 through division: 1004 ÷ 251 = 4. The quotient is an integer, indicating that 1004 is divisible by 251.
Problem 4
Can 503 be divisible by 251?
Yes, 503 is divisible by 251.
Explanation
We verify if 503 is divisible by 251 by performing division: 503 ÷ 251 = 2. Since the result is a whole number, 503 is divisible by 251.
Problem 5
Check the divisibility rule of 251 for 1255.
Yes, 1255 is divisible by 251.
Explanation
To confirm if 1255 is divisible by 251, we divide: 1255 ÷ 251 = 5. As the division yields an integer, 1255 is divisible by 251.
FAQs on Divisibility Rule of 251
1.What is the divisibility rule for 251?
2.How many numbers are there between 1 and 1000 that are divisible by 251?
3.Is 502 divisible by 251?
4.What if I get 0 after subtracting?
5.Does the divisibility rule of 251 apply to all integers?
6.How can children in Oman use numbers in everyday life to understand Divisibility Rule of 251?
7.What are some fun ways kids in Oman can practice Divisibility Rule of 251 with numbers?
8.What role do numbers and Divisibility Rule of 251 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 251 skills?
Important Glossaries for Divisibility Rule of 251
- Divisibility rule: A set of rules used to determine if a number is divisible by another number without performing division.
- Multiples: Results obtained by multiplying a number by an integer. For example, multiples of 251 are 251, 502, 753, etc.
- Integers: Numbers that include all whole numbers, negative numbers, and zero.
- Subtraction: The process of finding the difference between two numbers by reducing one from another.
- Absolute value: The non-negative value of a number without regard to its sign.
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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.
