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Last updated on February 14th, 2025
The divisibility rule is a way to determine whether a number is divisible by another number without performing division directly. In real life, divisibility rules help with quick calculations, dividing items evenly, and organizing tasks. In this topic, we will explore the divisibility rule for 561.
The divisibility rule for 561 is a method to check if a number is divisible by 561 without dividing. Let's examine whether 1683 is divisible by 561 using this rule.
Step 1: Multiply the last digit of the number by a factor, specific to 561. (For example, if the factor is 3, multiply the last digit by 3.)
Here, in 1683, the last digit is 3. Multiply it by 3: 3 × 3 = 9.
Step 2: Subtract the result from Step 1 from the remaining number, excluding the last digit. For example, 168 - 9 = 159.
Step 3: Check if the result (159 in this case) is divisible by 561. If it is, then the original number is divisible by 561. If it's not, then the original number isn't divisible by 561.
Knowing the divisibility rule helps simplify division. Here are some tips and tricks for understanding the divisibility rule of 561:
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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.