Question

Which of the following numbers is not divisible by 11? a.40,12,503 b.53,33,064 c.54,32,105 d.64,31,040

Answer 1

Answer:

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Step-by-step explanation:

a) all

b)53,64

c)all

d)all

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Answer 2

Answer:

Option (b),(c)

So $53,33,064$ and $54,32,105$ are not divisible by $11$

Step-by-step explanation:

Given:

$a.40,12,503\\ b.53,33,064 \\c.54,32,105 \\d.64,31,040$

We need to find which among these is not divisible by $11$.

The divisibility rule of $11$ is

the difference between the sum of the digits at the odd and even places equals $0$ or divisible by $11$, then the number is divisible by $11$.

Option a

$(4+1+5+3)-(0+2+0)=11$

$40,12,503$ is divisible by $11$

Option b

$(5+3+0+4)-(3+3+6)=1$

$53,33,064$ is not divisible by $11$

Option c

$(5+3+1+5)-(4+2+0)=8$

$54,32,105$ is not divisible by $11$

Option d

$(6+3+0+0)-(4+1+4)=0$

$64,31,040$ is divisible by $11$