Divisibility Rule of 20

The divisibility rule for 20 is a method by which we can find out if a number is divisible by 20 or not without using the division method. Check whether 340 is divisible by 20 with the divisibility rule.

Step 1: Check if the last digit of the number is 0. In 340, the last digit is 0.

Step 2: Check if the second last digit is even and the last digit is 0. In 340, 4 is even, and the last digit is 0.

Step 3: If both conditions are met, the number is divisible by 20. Thus, 340 is divisible by 20.

Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 20.

• Know the multiples of 20: Memorize the multiples of 20 (20, 40, 60, 80, 100...etc.) to quickly check divisibility. If the number resembles these multiples, it is divisible by 20.

• Use simple checks: For larger numbers, ensure the last two digits form a number divisible by 20 (e.g., 40, 60, 80).

• Repeat for large numbers: For large numbers, focus on the last two digits to determine divisibility. Ensure they align with known multiples of 20.

• Use the division method to verify: Students can use the division method to verify and cross-check their results. This will help them ensure accuracy and learn the process.

• 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 20 if the last digit is 0 and the second last digit is even.

• Multiples: Multiples are the results we get after multiplying a number by an integer. For example, multiples of 20 are 20, 40, 60, 80, etc.

• Even number: An integer that is divisible by 2. For example, 2, 4, 6, etc.

• Integer: Integers are whole numbers that include all positive and negative whole numbers and zero.

• Verification: The process of checking the accuracy of a result, often by using a different method such as division.