Divisibility Rule of 8


 
 
Concept Explanation
 

Divisibility Rule of 8

Divisibility Rule of 8 :

A natural number is divisible by 8, if the number formed by its digits in units, tens and hundreds place is divisible by 8.

Justification:

Consider a three digit number abcd.

We have,

         overline{abcd} = 1000a + 100b + 10c + d

Rightarrow    overline{abcd} = 1000a + (100b + 10c + d )

Rightarrow    overline{abcd} = 1000a + overline{bcd}

Rightarrow    overline{abcd} = ( 8 times 125a ) + overline{bcd}

Rightarrow    overline{abcd} = a multiple of 8 + overline{bcd}

Rightarrow    overline{abcd} is divisible by  8, if overline{bcd} i.e. the number formed by digits in units, tens and hundreds places is divisible by 8.

.... (More Text Available, Login?)
Sample Questions
(More Questions for each concept available in Login)
Question : 1

Which number is divisible by 2, 4 and 8?

Right Option : C
View Explanation
Explanation
Question : 2

Which of the following is divisible by 8 ?

Right Option : C
View Explanation
Explanation
Question : 3

Which number is divisible by 4 and 8?

Right Option : C
View Explanation
Explanation
 
 


Students / Parents Reviews [10]