Question

while presenting a data in the form of a positive number,I committed a mistake by mentioning the cube of the number.If the error due to the mistake was 800percent,What was the number?
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Answer 1

Given : while presenting a data in the form of a positive number. a mistake by mentioning the cube of the number.

the error due to the mistake was 800percent,

To Find : Number

Solution:

Let say Number was  N

Mentioned   N³

Error  = N³ - N  = N(N² - 1)

Error %  =  100 * N(N² - 1)/N

= 100(N² - 1)

=> 100  (N² - 1) = 800

=> N² - 1 = 8

=> N² = 9

=> N = ±3

positive number

Hence N = 3

Number was 3  

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