Aptitude - Numbers - Discussion

Discussion :: Numbers - General Questions (Q.No.102)

102. 

If the number 91876 * 2 is completely divisible by 8, then the smallest whole number in place of * will be:

[A]. 1
[B]. 2
[C]. 3
[D]. 4
[E]. None of these

Answer: Option C

Explanation:

Then number 6x2 must be divisible by 8.

   x = 3, as 632 is divisible 8.


Shalima Shalaka said: (Jun 21, 2015)  
How can we know that the answer is 3 please explain?

Aparna said: (Jul 2, 2015)  
Is it last 3 digits or 2 digits please tell me?

Sivakumar.K said: (Jul 8, 2015)  
To substitute x=0, x=1, x=2, x=3....x=9.

When x=3 to substitute in between "6x2" is completely divisible by 8 and it's not given remaining value, if you have any doubt to substitute x=0 up-to 9 in between "6x2".

Sasi said: (Sep 21, 2015)  
Last 3 digits are divisible by 8. When put x=3. Other can't exist.

Chan said: (May 31, 2016)  
Hi @Sasi.

9187632 is completely divisible by 8.

Once again check it.

Vebs said: (Jul 30, 2016)  
I can't understand yet, please help me.

Ramesh said: (Oct 12, 2016)  
91876 x 2 is divisible by 8.
9 + 1 + 8 + 7 + 6 + x + 2 is divisible by 8.
33 + x is divisible by 8.
So smallest value of x = 7 is divisible by 8.
So the answer is none of above.

Sukumar said: (Apr 14, 2017)  
How the answer is 3?

Please explain.

D,Virajini said: (May 30, 2017)  
How did you check the answer if it is 3?

D.Virajini said: (May 30, 2017)  
I agree with the answer @Ramesh.

Pankil said: (Jun 6, 2017)  
6 x 2 (where x=7 also divisible by 8) and 9187672 also divisible by 8.

So that, we can get an answer with a Two-way number.

Rinkal said: (Dec 10, 2017)  
I agree with answers @Ramesh.

Dhara said: (Mar 28, 2018)  
Explain the solution, please.

Vinod said: (May 27, 2018)  
The given no is completely divided by 8 only when last three digits are completely divided by 8.
here last three digits are 6*2.

If we put 3 in place of * then it will completely be divided by 8. Hence 3 is the answer.
Hope all got it now.

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