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# Chris entered a number in his calculator and erroneously

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Chris entered a number in his calculator and erroneously [#permalink]  22 Feb 2018, 13:48
Expert's post
00:00

Question Stats:

81% (00:32) correct 18% (00:48) wrong based on 16 sessions

Chris entered a number in his calculator and erroneously multiplied the number by 2,073 instead of 2.073, getting an incorrect product. Which of the following is a single operation that Chris could perform on his calculator to correct the error?

Indicate $$all$$ such operations.

A Multiply the incorrect product by 0.001

B Divide the incorrect product by 0.001

C Multiply the incorrect product by 1,000

D Divide the incorrect product by 1,000
[Reveal] Spoiler: OA

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Moderator
Joined: 18 Apr 2015
Posts: 5586
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Kudos [?]: 1118 [0], given: 5174

Re: Chris entered a number in his calculator and erroneously [#permalink]  22 Feb 2018, 14:44
Expert's post
Explanation

This is actually a mirror question, I could say.

If you multiply a number x * 2,703 instead of 2.703, to re-establish the right situation in the

• first case x * 2,703 you have to multiply the same number for one thousand but in the mirror, which means divide the same number for 0.001 which is choice A.
• On the other hand: scanning the answer choices the same process should be performed on the contrary. Multiply the number for the mirror of 0.001 which is 1,000. D is the other option.

The answer are A and D.
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Re: Chris entered a number in his calculator and erroneously [#permalink]  11 Apr 2018, 21:39
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A and D will do the same operation to the equation which is correct.

Dividing with 0.001 is confusing but that will do opposite of what is required for correction.

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Re: Chris entered a number in his calculator and erroneously [#permalink]  11 Apr 2018, 23:34
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when X is multiplied by 2073 instead of 2.073 then the required result will be obtained when the erroneous operation is either multiplied by 0.001 or divided by 1000.
Re: Chris entered a number in his calculator and erroneously   [#permalink] 11 Apr 2018, 23:34
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