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Last updated on February 18th, 2025
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 855.
The divisibility rule for 855 is a method by which we can find out if a number is divisible by 855 or not without using the division method. Check whether 76950 is divisible by 855 with the divisibility rule.
Step 1: Check if the number is divisible by 5 (since one of the prime factors of 855 is 5). The last digit of 76950 is 0, which is divisible by 5.
Step 2: Check if the number is divisible by 3 (another prime factor of 855). Add the digits: 7 + 6 + 9 + 5 + 0 = 27. Since 27 is divisible by 3, 76950 passes the test for 3.
Step 3: Check if the number is divisible by 19 (since the third factor of 855 is 19). Use long division or a calculator to verify that 76950 is divisible by 19.
Since 76950 is divisible by 5, 3, and 19, it is divisible by 855.
Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 855.
Memorize the factors of 855 (3, 5, 19) to quickly check divisibility.
Use the sum of digits for 3: For the factor 3, remember to add all digits and check if the sum is a multiple of 3.
Once you verify divisibility by the individual factors, multiply the factors back to confirm divisibility by 855.
Students can use the division method as a way to verify and crosscheck their results. This will help them to verify and also learn.
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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.
: She loves to read number jokes and games.