202 LearnersLast updated on May 26th, 2025
Divisibility Rule of 285
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 285.
What is the Divisibility Rule of 285?
The divisibility rule for 285 is a method by which we can find out if a number is divisible by 285 or not without using the division method. Check whether 5700 is divisible by 285 with the divisibility rule.
Step 1: Check if the number is divisible by 5. A number is divisible by 5 if its last digit is 0 or 5. Here, the last digit of 5700 is 0, so it is divisible by 5.
Step 2: Check if the number is divisible by 3. A number is divisible by 3 if the sum of its digits is divisible by 3. The sum of the digits of 5700 is 5+7+0+0 = 12. Since 12 is divisible by 3, 5700 is also divisible by 3.
Step 3: Check if the number is divisible by 19. For simplicity, use the division method to verify this step.
Since 5700 is divisible by 5, 3, and 19, it is divisible by 285.
Tips and Tricks for Divisibility Rule of 285
Learn the divisibility rule to help master division. Let’s learn a few tips and tricks for the divisibility rule of 285.
Know the multiples of 285:
Memorize the multiples of 285 (285, 570, 855, etc.) to quickly check divisibility.
Use the division method:
For checking divisibility by 19, using the division method can be a reliable approach.
Combine rules:
Remember that if a number is divisible by 5, 3, and 19, it is divisible by 285.
Use calculator verification:
A calculator can be used to verify divisibility quickly.
Common Mistakes and How to Avoid Them in Divisibility Rule of 285
The divisibility rule of 285 helps us to quickly check if a given number is divisible by 285, but common mistakes like calculation errors lead to incorrect conclusions. Here we will understand some common mistakes that will help you to avoid them.
Mistake 1
Not following the correct steps.
Students should follow the correct steps: check divisibility by 5, 3, and 19 separately.
Mistake 2
Incorrectly summing digits for 3.
Ensure each digit is included and summed correctly to check divisibility by 3.
Mistake 3
Ignoring divisibility by 19.
Don’t forget to check divisibility by 19, as it is essential for divisibility by 285.
Mistake 4
Confusing the steps.
Practice regularly to remember the sequence of steps.
Mistake 5
Not considering negative values.
Students may disregard negative results, thinking divisibility rules don't apply to them. The divisibility rule is applicable for negative values too. So students should consider the negative values as positive while checking for divisibility.
Divisibility Rule of 285 Examples
Problem 1
Is 570 divisible by 285?
Yes, 570 is divisible by 285.
Explanation
To determine if 570 is divisible by 285, follow these steps:
1) Divide 570 by 285.
2) Calculate the quotient: 570 ÷ 285 = 2.
3) Check if the quotient is an integer. Since it is, 570 is divisible by 285.
Problem 2
Check the divisibility rule of 285 for 855.
Yes, 855 is divisible by 285.
Explanation
For checking the divisibility of 855 by 285:
1) Divide 855 by 285.
2) Calculate the quotient: 855 ÷ 285 = 3.
3) Check if the quotient is an integer. Since it is, 855 is divisible by 285.
Problem 3
Is -1140 divisible by 285?
Yes, -1140 is divisible by 285.
Explanation
To check if -1140 is divisible by 285, we ignore the negative sign:
1) Divide 1140 by 285.
2) Calculate the quotient: 1140 ÷ 285 = 4.
3) Check if the quotient is an integer. Since it is, -1140 is divisible by 285.
Problem 4
Can 750 be divisible by 285 following the divisibility rule?
No, 750 isn't divisible by 285.
Explanation
To check if 750 is divisible by 285:
1) Divide 750 by 285.
2) Calculate the quotient: 750 ÷ 285 ≈ 2.63.
3) Check if the quotient is an integer. Since it is not, 750 is not divisible by 285.
Problem 5
Check the divisibility rule of 285 for 1425.
Yes, 1425 is divisible by 285.
Explanation
To check the divisibility of 1425 by 285:
1) Divide 1425 by 285.
2) Calculate the quotient: 1425 ÷ 285 = 5.
3) Check if the quotient is an integer. Since it is, 1425 is divisible by 285.
FAQs on Divisibility Rule of 285
1. What is the divisibility rule for 285?
2.How many numbers are there between 1 and 1000 that are divisible by 285?
3. Is 855 divisible by 285?
4.What if a number is divisible by only two of the three required factors?
5.Does the divisibility rule of 285 apply to all integers?
6.How can children in Saudi Arabia use numbers in everyday life to understand Divisibility Rule of 285?
7.What are some fun ways kids in Saudi Arabia can practice Divisibility Rule of 285 with numbers?
8.What role do numbers and Divisibility Rule of 285 play in helping children in Saudi Arabia develop problem-solving skills?
9.How can families in Saudi Arabia create number-rich environments to improve Divisibility Rule of 285 skills?
Important Glossary for Divisibility Rule of 285
- Divisibility rule: A set of rules used to determine if a number is divisible by another number without direct division.
- Multiple: The result of multiplying a number by an integer. For example, multiples of 285 include 285, 570, and 855.
- Integer: A whole number that can be positive, negative, or zero.
- Sum of digits: The total obtained by adding all the digits in a number.
- Division method: A mathematical procedure to determine the quotient and remainder of dividing two numbers, used here to verify divisibility.
Explore More numbers
About BrightChamps in Saudi Arabia
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.
