Divisibility Rule of 5


 
 
Concept Explanation
 

Divisibility Rule of 5

Divisibility Rule of 5: Numbers that are divisible by 5 must end in 5 or 0. Illustration: Check whether 34,780 is divisible by 5 or not? Solution: For this rule, we just look at the last digit: 34,780. The last digit is a 0, so this number is divisible by 5. Illustration: Check whether 13,569 is divisible by 5 or not? Solution: Again, we will focus our attention on the last digit: 13,569. The last digit is  9, so this number is not divisible by 5.

Illustration: Check which of the following numbers are divisible by 5?

                  1236, 2525, 10000, 7898

Solution: As 1236, 7898 ends with digits 6, 8 respectively, hence these numbers are not divisible by 5. But 2525, 100000 ends with digits 5, 0 respectively. Hence these two numbers are divisible by 5.

Illustration: Check which of the following numbers are divisible by 5?

                  1235, - 5656, - 5250, 1002

Solution: As 1235, - 5250 ends with digits 5, 0 respectively, Hence these two numbers are divisible by 5. But - 5656, 1002 ends with digits 6, 2 respectively, Hence these two numbers are not divisible by 5.

Sample Questions
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Question : 1

Write 265 in the form 10b + a then check its divisibility by 5. Find the value of a and b also.

Right Option : C
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Question : 2

What smallest number should be there at Delta alpha to make the 7164Delta alpha  divisible by 5.

Right Option : C
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Explanation
Question : 3

Write 7865 in the form 10b + a then check its divisibility by 5. Find the value of a and b also.

Right Option : B
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Explanation
 
 


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