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Re: The number 10^30 is divisible for all of the following EXCEPT
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12 Jun 2018, 23:13

2

Solution

To find:

• Out of the given options, which one does not divide the number \(10^{30}\)

Approach and Working: We can factorise all the options as well as the given number \(10^{30}\) to tally the prime factors

• However, if we observe the options, we can see 6 is consists of the prime factors 2 and 3. • Also, 3 can never divide any number which is in the form of \(10^x\), where x is a whole number

The number 10^30 is divisible for all of the following EXCEPT
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13 Jun 2018, 07:27

Bunuel wrote:

The number \(10^{30}\) is divisible for all of the following EXCEPT

A. 250 B. 125 C. 32 D. 16 E. 6

Number is devisible by 3, if sum of all digits is divisible by 3. \(10^{30}=10......00\) - the sum will be 1, which is not divisible by 3 or any multiple of 3. Since 6=3*2, Answer is E.