Divisibility Rule of 805

The divisibility rule for 805 is a method by which we can determine if a number is divisible by 805 without using the division method. Let's check whether 1610 is divisible by 805 using the divisibility rule.

Step 1: Divide the number into groups of three digits from right to left. Here in 1610, we have 1 and 610 as the groups.

Step 2: Subtract the first group from the second group. i.e., 610 - 1 = 609.

Step 3: Since 609 is not a multiple of 805, the number is not divisible by 805.

Learning the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 805.

Know the multiples of 805:

Memorize the multiples of 805 (805, 1610, 2415, 3220, etc.) to quickly check divisibility. If the result from the subtraction is a multiple of 805, then the number is divisible by 805.

Use negative numbers:

If the result we get after the subtraction is negative, we will avoid the symbol and consider it positive for checking the divisibility of a number.

Repeat the process for large numbers:

Students should keep repeating the divisibility process until they reach a small number that is divisible by 805.
For example, check if 3220 is divisible by 805 using the divisibility test. Divide the number into groups, 3 and 220. Subtract the first group from the second, 220 - 3 = 217. Since 217 is not a multiple of 805, 3220 is not divisible by 805.

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 verify and also learn.

• 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 805 if it follows the specific divisibility rule for 805.

• Multiples: Multiples are the results we get after multiplying a number by an integer. For example, multiples of 805 are 805, 1610, 2415, 3220, etc.

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

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

• Verification: The act of confirming that a number is divisible by another through additional methods, such as direct division, to ensure accuracy.