178 LearnersLast updated on May 26th, 2025
Divisibility Rule of 845
The divisibility rule is a way to determine whether a number is divisible by another number without performing actual division. In real life, we use divisibility rules for quick calculations, equal distribution, and organization. In this topic, we will learn about the divisibility rule of 845.
What is the Divisibility Rule of 845?
The divisibility rule for 845 is a method by which we can determine if a number is divisible by 845 without actual division. Let's check whether 1690 is divisible by 845 using the divisibility rule.
Step 1: Check divisibility by 5. Since the last digit of 1690 is 0, 1690 is divisible by 5.
Step 2: Check divisibility by 169 (the result of 845 divided by 5). Divide 1690 by 169 to see if the result is an integer. 1690 ÷ 169 = 10, which is an integer.
Step 3: Since 1690 is divisible by both 5 and 169, it is divisible by 845.
Tips and Tricks for Divisibility Rule of 845
Understanding the divisibility rule will help students master division. Let’s learn a few tips and tricks for the divisibility rule of 845.
Know the factors of 845:
Memorize the factors of 845, which are 5 and 169, to check divisibility quickly.
Use prime factorization:
Recognize that 845 = 5 × 169. Checking divisibility by each factor separately can simplify the process.
Repeat the process for large numbers:
For large numbers, break them down into smaller parts using divisibility rules of 5 and 169.
Use the division method to verify:
Always use the division method to verify and cross-check your results. This will help confirm your calculations.
Common Mistakes and How to Avoid Them in Divisibility Rule of 845
The divisibility rule of 845 helps us quickly check divisibility, but common mistakes like calculation errors can lead to incorrect conclusions. Here we will understand some common mistakes to avoid.
Mistake 1
Not checking divisibility by both factors.
Always check divisibility by both 5 and 169 to ensure the number is divisible by 845.
Mistake 2
Forgetting to verify with division.
After using the rule, confirm the result with actual division to avoid mistakes.
Mistake 3
Confusing the factors.
Remember that 845 is 5 times 169. Practice to avoid mixing up the factors.
Mistake 4
Not repeating the process for large numbers.
For large numbers, break them down and use the divisibility rule repeatedly.
Mistake 5
Overlooking the importance of factorization.
Understand and use prime factorization to simplify the divisibility checking process.
Divisibility Rule of 845 Examples
Problem 1
Is 1690 divisible by 845?
No, 1690 is not divisible by 845.
Explanation
To check if 1690 is divisible by 845, we need to follow the appropriate divisibility rule.
1) Identify the last three digits of the number, which are 690.
2) Subtract 690 from the full number, which gives 1690 - 690 = 1000.
3) Check if the result, 1000, is a multiple of 845. No, 1000 is not a multiple of 845.
Problem 2
Check the divisibility rule of 845 for 2535.
Yes, 2535 is divisible by 845.
Explanation
To verify the divisibility of 2535 by 845, follow these steps:
1) Identify the last three digits of the number, which are 535.
2) Subtract 535 from the full number, which gives 2535 - 535 = 2000.
3) Check if the result, 2000, is a multiple of 845. Yes, 2000 is a multiple of 845 (845 x 2.37, approximately), showing divisibility.
Problem 3
Is -845 divisible by 845?
Yes, -845 is divisible by 845.
Explanation
To determine if -845 is divisible by 845, ignore the negative sign and check the positive value.
1) The number is 845, which is exactly equal to 845.
2) Since 845 is equal to itself, it is naturally divisible by 845.
Problem 4
Can 1690 be divisible by 845 following the divisibility rule?
No, 1690 is not divisible by 845.
Explanation
To check if 1690 is divisible by 845, apply the divisibility rule:
1) The last three digits of 1690 are 690.
2) Subtract 690 from the number, resulting in 1690 - 690 = 1000.
3) Check if 1000 is a multiple of 845. No, 1000 is not a multiple of 845.
Problem 5
Check the divisibility rule of 845 for 8450.
Yes, 8450 is divisible by 845.
Explanation
To confirm the divisibility of 8450 by 845, follow these steps:
1) Identify the last three digits of the number, which are 450.
2) Subtract 450 from the full number, which gives 8450 - 450 = 8000.
3) Check if 8000 is a multiple of 845. Yes, 8000 is a multiple of 845 (845 x 9.467, approximately), confirming divisibility
FAQs on Divisibility Rule of 845
1.What is the divisibility rule for 845?
2.How can I quickly check if a number is divisible by 5?
3.Is 845 divisible by 845?
4. What should I do if I find a mistake in my calculation?
5.Does the divisibility rule of 845 apply to all integers?
6.How can children in Oman use numbers in everyday life to understand Divisibility Rule of 845?
7.What are some fun ways kids in Oman can practice Divisibility Rule of 845 with numbers?
8.What role do numbers and Divisibility Rule of 845 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 845 skills?
Important Glossaries for Divisibility Rule of 845
- Divisibility Rule: A set of guidelines used to determine whether a number is divisible by another number without performing division.
- Factors: Numbers that multiply together to form another number. For example, factors of 845 are 5 and 169.
- Prime Factorization: Breaking down a number into its prime factors, e.g., 845 = 5 × 169.
- Integer: Whole numbers that can be positive, negative, or zero.
- Verification: The process of confirming a result through alternative methods, such as actual division.
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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.
