Divisibility Rule for 10
Divisibility Rule for 10
Divisibility Rule of 10: This rule is used to check whether a number is divisible by 10 or not without performing long division. The rule states that a number is divisible by 10 if and only if tis units digit is zero.
Justification: Let ...cba be an arbitrary number whose ones digit is a, tens digit is b, hundreds digit is c and so on. Then,the number can be expanded as
is divisible by 10 if and only if a = 0.
is divisibli by 10 if and only if its units digit is 0.
It follows from the above discussion that a number is divisible by 10 if and only if tis units digit is zero.
Illustration: Check whether 241630.is divisible by 10.
Solution: To check whether 241630 is divisible by 10. As the digit at the unit place is 0. So the number is divisible by 10.
Illustration: Check whether 187525.is divisible by 10.
Solution: To check whether 187525 is divisible by 10. As the digit at the unit place is 5. So the number is not divisible by 10.
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