Divisibility Rule of 70

The divisibility rule for 70 is a method by which we can find out if a number is divisible by 70 or not without using the division method. To check whether 2100 is divisible by 70 with the divisibility rule, follow these steps:

Step 1: Check if the number is divisible by both 7 and 10. 

Step 2: A number is divisible by 10 if its last digit is 0. Here, the last digit of 2100 is 0, so it is divisible by 10.

Step 3: Check divisibility by 7 using its rule. For example, with 210, multiply the last digit by 2: 0 × 2 = 0. Subtract from the remaining number: 21 – 0 = 21. Since 21 is a multiple of 7, 210 is divisible by 7.

Step 4: Since 2100 is divisible by both 7 and 10, it is divisible by 70.

Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 70.

• Know the multiples of 70: Memorize the multiples of 70 (70, 140, 210, 280, etc.) to quickly check divisibility.

• Use the divisibility rules for 7 and 10: Ensure the number passes both divisibility rules for 7 and 10 to confirm divisibility by 70.

• Repeat the process for large numbers: For large numbers, repeatedly check divisibility by 7 and 10 until you confirm divisibility by 70.

• Use the division method to verify: Use the division method to verify and cross-check results, reinforcing learning and accuracy.

• Divisibility rule: A set of rules used to find out whether a number is divisible by another number.

• Multiples: Results obtained by multiplying a number by an integer. For example, multiples of 70 are 70, 140, 210, etc.

• Integers: Numbers that include all whole numbers, negative numbers, and zero.

• Subtraction: A process of finding the difference between two numbers by reducing one from another.

• Division: The process of finding how many times one number is contained within another.