205 LearnersLast updated on May 26th, 2025
Divisibility Rule of 493
The divisibility rule is a technique to determine whether a number is divisible by another number without performing direct division. In real life, divisibility rules help us with quick calculations, evenly dividing things, and sorting items. In this topic, we will learn about the divisibility rule of 493.
What is the Divisibility Rule of 493?
The divisibility rule for 493 is a method to determine if a number is divisible by 493 without using direct division. Let's check whether 986 is divisible by 493 using this rule.
Step 1: Multiply the last digit of the number by 986 by 493's last digit. Here, 6 is the last digit of 986. Multiply it by 3. So, 6 × 3 = 18.
Step 2: Subtract the result from Step 1 from the remaining values, excluding the last digit. So, 98 - 18 = 80.
Step 3: Since 80 is not a multiple of 493, 986 is not divisible by 493. If the result from Step 2 were a multiple of 493, then the number would be divisible by 493.
Tips and Tricks for Divisibility Rule of 493
Learning the divisibility rule will help kids master division. Here are some tips and tricks for the divisibility rule of 493.
- Know the multiples of 493: Memorize the multiples of 493 (493, 986, 1479, etc.) to quickly check divisibility. If the result from the subtraction is a multiple of 493, then the number is divisible by 493.
- Use the absolute value: If the result we get after the subtraction is negative, take its absolute value for checking divisibility.
- Repeat the process for large numbers: Students should repeat the divisibility process until reaching a small number that is divisible by 493.
For example, check if 1972 is divisible by 493 using the divisibility test. Multiply the last digit by 3, i.e., 2 × 3 = 6.
Subtract 6 from the remaining digits, 197 - 6 = 191. Since 191 is still a large number, repeat the process. Multiply the last digit by 3, i.e., 1 × 3 = 3.
Subtract 3 from the remaining digits, 19 - 3 = 16. As 16 is not a multiple of 493, 1972 is not divisible by 493.
- Use division to verify: Students can use the division method as a way to verify and cross-check their results. This will help them confirm their understanding.
Common Mistakes and How to Avoid Them in Divisibility Rule of 493
The divisibility rule of 493 helps us quickly check if a given number is divisible by 493, 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.
Follow the correct steps: multiply the last digit by 3 and subtract the result from the remaining digits, excluding the last digit, then check if it is a multiple of 493.
Mistake 2
Including the last digit in subtraction.
Exclude the last digit when subtracting and only include the remaining digits.
Mistake 3
Not repeating the process when the result is large.
Continue the process until you get a small number that is divisible by 493.
Mistake 4
Not considering the absolute values.
Consider the absolute value of negative results when checking divisibility.
Mistake 5
Confusing the steps.
Regular practice will help avoid confusion and ensure correct application of the steps.
Divisibility Rule of 493 Examples
Problem 1
Can 987,654 be divided by 493 without a remainder?
No, 987,654 is not divisible by 493.
Explanation
To determine if 987,654 is divisible by 493, we can follow these steps:
1) Consider the last three digits, which are 654.
2) Calculate 654 modulo 493, which gives 161.
3) Since 161 is not zero, 987,654 is not divisible by 493.
Problem 2
Is the number 246,500 divisible by 493?
No, 246,500 is not divisible by 493.
Explanation
To check divisibility by 493:
1) Take the last three digits, 500.
2) Compute 500 modulo 493, which results in 7.
3) Since 7 is not zero, 246,500 is not divisible by 493.
Problem 3
Determine if 1,479,000 is divisible by 493.
Yes, 1,479,000 is divisible by 493.
Explanation
To check divisibility:
1) Take the last three digits, 000.
2) Calculate 000 modulo 493, which is 0.
3) Since the result is zero, 1,479,000 is divisible by 493.
Problem 4
Can 2,967,123 be evenly divided by 493?
No, 2,967,123 is not divisible by 493.
Explanation
Follow these steps:
1) Consider the last three digits, 123.
2) Compute 123 modulo 493, which equals 123.
3) Since 123 is not zero, 2,967,123 is not divisible by 493.
Problem 5
Is 789,492 divisible by 493?
Yes, 789,492 is divisible by 493.
Explanation
To check:
1) Take the last three digits, 492.
2) Calculate 492 modulo 493, which results in 492.
3) Since the remainder is one less than 493 (and thus indicates one full cycle), 789,492 is divisible by 493.
FAQs on Divisibility Rule of 493
1.What is the divisibility rule for 493?
2.How many numbers between 1 and 1000 are divisible by 493?
3.Is 493 divisible by 493?
4.What if I get 0 after subtracting?
5.Does the divisibility rule of 493 apply to all integers?
6.How can children in Qatar use numbers in everyday life to understand Divisibility Rule of 493?
7.What are some fun ways kids in Qatar can practice Divisibility Rule of 493 with numbers?
8.What role do numbers and Divisibility Rule of 493 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 493 skills?
Important Glossaries for Divisibility Rule of 493
- Divisibility Rule: The set of rules used to determine if a number is divisible by another number without direct division.
- Multiples: The results obtained after multiplying a number by an integer. For example, multiples of 493 are 493, 986, 1479, 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 number from another.
- Absolute Value: The non-negative value of a number regardless of its sign, used in checking divisibility.
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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.
