212 LearnersLast updated on May 26th, 2025
Divisibility Rule of 19
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 19.
What is the Divisibility Rule of 19?
The divisibility rule for 19 is a method by which we can find out if a number is divisible by 19 or not without using the division method.
Check whether 266 is divisible by 19 with the divisibility rule.
Step 1: Multiply the last digit of the number by 2, here in 266, 6 is the last digit, multiply it by 2. 6 × 2 = 12
Step 2: Add the result from Step 1 to the remaining values but do not include the last digit. i.e., 26 + 12 = 38.
Step 3: As it is shown that 38 is not a multiple of 19, the number is not divisible by 19. If the result from step 2 is a multiple of 19, then the number is divisible by 19.
Tips and Tricks for Divisibility Rule of 19
Learning the divisibility rule will help kids to master division. Let’s learn a few tips and tricks for the divisibility rule of 19.
- Know the multiples of 19: Memorize the multiples of 19 (19, 38, 57, 76, 95…etc.) to quickly check the divisibility. If the result from the addition is a multiple of 19, then the number is divisible by 19.
- Use the negative numbers: If the result we get after the addition is negative, we will avoid the symbol and consider it as positive for checking the divisibility of a number.
- Repeat the process for large numbers: Students should keep repeating the divisibility process until they reach a small number that is divisible by 19.
For example: Check if 1147 is divisible by 19 using the divisibility test. Multiply the last digit by 2, i.e., 7 × 2 = 14. Add the remaining digits excluding the last digit by 14, 114 + 14 = 128.
Still, 128 is a large number, hence we will repeat the process again and multiply the last digit by 2, 8 × 2 = 16. Now adding 16 to the remaining numbers excluding the last digit, 12 + 16 = 28. As 28 is not a multiple of 19, 1147 is not divisible by 19.
- Use the division method to verify: Students can use the division method as a way to verify and crosscheck their results. This will help them verify and also learn.
Common Mistakes and How to Avoid Them in Divisibility Rule of 19
The divisibility rule of 19 helps us quickly check if the given number is divisible by 19, but common mistakes like calculation errors lead to incorrect calculations. Here we will understand some common mistakes that will help you to understand.
Mistake 1
Not following the correct steps.
Students should follow the correct steps that are multiplying the last digit by 2 and then adding the result to the remaining digits excluding the last digit and checking whether it is a multiple of 19.
Divisibility Rule of 19 Examples
Problem 1
Is 570 divisible by 19?
Yes, 570 is divisible by 19.
Explanation
To check if 570 is divisible by 19, follow these steps:
1) Take the last digit of the number, which is 0.
2) Double it to get 0 × 2 = 0.
3) Subtract this result from the remaining digits, 57 - 0 = 57.
4) Check if 57 is divisible by 19. Yes, 57 is divisible by 19 (19 × 3 = 57).
Problem 2
Check the divisibility rule of 19 for 874.
Yes, 874 is divisible by 19.
Explanation
To verify if 874 is divisible by 19:
1) Take the last digit, 4, and double it to get 4 × 2 = 8.
2) Subtract this from the remaining digits, 87 - 8 = 79.
3) Check if 79 is divisible by 19. Yes, 79 is divisible by 19 (19 × 4 = 76).
Problem 3
Is -209 divisible by 19?
Yes, -209 is divisible by 19.
Explanation
To determine if -209 is divisible by 19, ignore the negative sign and proceed:
1) Take the last digit, 9, and double it to get 9 × 2 = 18.
2) Subtract this from the remaining digits, 20 - 18 = 2.
3) Check if 2 is divisible by 19. As 19 doesn't divide 2, re-evaluate by direct division: 209 ÷ 19 = 11.
Problem 4
Can 333 be divisible by 19 following the divisibility rule?
No, 333 isn't divisible by 19.
Explanation
To check the divisibility of 333 by 19:
1) Take the last digit, 3, and double it to get 3 × 2 = 6.
2) Subtract this from the remaining digits, 33 - 6 = 27.
3) Check if 27 is divisible by 19. No, 27 isn't divisible by 19.
Problem 5
Check the divisibility rule of 19 for 1,197.
Yes, 1,197 is divisible by 19.
Explanation
To check if 1,197 is divisible by 19:
1) Take the last digit, 7, and double it to get 7 × 2 = 14.
2) Subtract this from the remaining digits, 119 - 14 = 105.
3) Check if 105 is divisible by 19. Yes, 105 is divisible by 19 (19 × 5 = 95).
FAQs on Divisibility Rule of 19
1.What is the divisibility rule for 19?
2.How many numbers are there between 1 and 100 that are divisible by 19?
3.Is 57 divisible by 19?
4.What if I get 0 after adding?
5.Does the divisibility rule of 19 apply to all the integers?
6.How can children in United States use numbers in everyday life to understand Divisibility Rule of 19?
7.What are some fun ways kids in United States can practice Divisibility Rule of 19 with numbers?
8.What role do numbers and Divisibility Rule of 19 play in helping children in United States develop problem-solving skills?
9.How can families in United States create number-rich environments to improve Divisibility Rule of 19 skills?
Important Glossaries for Divisibility Rule of 19
- Divisibility rule: The set of rules used to find out whether a number is divisible by another number or not. For example, a number is divisible by 2 if the number ends with an even number.
- Multiples: Multiples are the results we get after multiplying a number by an integer. For example, multiples of 19 are 19, 38, 57, 76, etc.
- Integers: Integers are the numbers that include all the whole numbers, negative numbers, and zero.
- Addition: Addition is the process of combining two or more numbers to get their total or sum.
- Subtraction: Subtraction is a process of finding out the difference between two numbers by reducing one number from another.
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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.
