Algebra
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Q.

A student was asked to divide a number by 6 and add 12 to the quotient. He, however first added 12 to the number and then divided it by 6, getting 112 as the answer. The correct answer should have been:

 A.

122

 B.

118

 C.

114

 D.

124

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Solution:
Option(A) is correct

Let the number be $x$, then operations undertook by the student:

\(\left(\dfrac{x+12}{6}\right)=112\)

\(\Rightarrow x=660\)

Correct answer

\(=\dfrac{660}{6}+12\)

\(=122\)

Edit: A typo in the solution has been corrected after it was pointed by DrRekha Lahoti.


(3) Comment(s)


Sravan Reddy
 ()

This is the same as question 3 :)



DrRekha Lahoti
 ()

There is some error in the solution.

Replace 2 by 6 in the denominator and add 12 to it. (2nd last step)


Deepak
 ()

Thank you for pointing it out, corrected the solution.