Question

A student multiplied 7236 by 65 instead of multiplying by 56. By how much was his answer greater than the correct answer?
(Hint: Do you need to do both the multiplications?)

Answer 1

$\text{The required multiplication = 7236*56}$


$\text{The multiplication done by the student = 7236*65}$


$\text{Difference}$$= [7236 \times 65] - [7236 \times 56]$


$= 7236 [65 - 56]$


$= 7236 \times 9 = 65124$


$\textbf{Answer: 65,124}$