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Q.

A student multiplied 7236 by 65 instead of multiplying with 56. By how much is his answer greater than the correct answer?


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a

65,125

b

65,124

c

65,241

d

65,421 

answer is B.

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Detailed Solution

Concept: According to the given conditions,
The student had to multiply 7236 by 56 which is the correct one.
So, we get
Question ImageBut the student multiplied by 65 which is the incorrect one.
So, we get Question ImageNow, we will find out the difference between the correct and the incorrect value by subtracting equation (1) from equation (2), we get
Question ImageBy taking out 7236 as the common factor, we get
Question ImageHence, the correct answer is option (2).
 
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