Question

A student multiplied 4065 by 36 instead of 3
By how much was his answer smaller than the correct
answer ?
​

Answer 1

Solution

As per the given conditions

The student had to multiply 7236 by 56

So 7236 x 56 ——(i) which is the correct one

But the student multiplied by 65

Sp 7236 x 65 ———(ii) which is the wrong one

Hence the difference between the correct and the incorrect value can be calculated by subtracting the two above obtained equations (i) and (ii). That is

7236 x 65 – 7236 x 56

Taking out 7236 as the common factor

=7236 (65-56)

=7236 (9)

= 7236 x 9

= 65124

Answer

Therefore the first answer was greater than the second one by the value 65124.