Divisibility Rule of 324

The divisibility rule for 324 is a method by which we can determine if a number is divisible by 324 without using the division method. Check whether 648 is divisible by 324 using the divisibility rule.

Step 1: Check if the number is divisible by 4. For 648, the last two digits are 48, and 48 is divisible by 4. 

Step 2: Check if the number is divisible by 81. Sum the digits of 648: 6 + 4 + 8 = 18. Since 18 is not divisible by 81, 648 is not divisible by 324.

Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 324.

• Know the factors of 324: Memorize the factors of 324 (2^2, 3^4) to quickly check divisibility. A number must be divisible by both 4 and 81 to be divisible by 324.

• Use smaller tests: If the number is too large, break it down by testing smaller parts separately for divisibility by 4 and 81.

• Repeat the process for large numbers: Students should keep repeating the divisibility process until they reach a small number that is divisible by 324. For example: Check if 1296 is divisible by 324 using the divisibility test. Verify divisibility by 4 and 81 separately.

• Use the division method to verify: Students can use the division method as a way to verify and cross-check their results. This will help them to verify and also learn.

• Divisibility rule: The set of rules used to find out whether a number is divisible by another number without performing division.

• Factors: Numbers that divide another number exactly without leaving a remainder. Example: Factors of 324 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, and 324.

• Multiple: A number that can be divided by another number without leaving a remainder. For example, 648 is a multiple of 324.

• Sum of digits: The sum obtained by adding all the digits of a number. Used to check divisibility by 9 and 81.

• Subtraction: The process of finding the difference between two numbers, not typically used directly in the divisibility rule for 324 but relevant in number operations.