A boy was asked to multiply a number by 12. But he multiplied by 21 and got his answer 63 more than the correct answer. The number to be multiplied was
Answer & explanation
Correct answer: option 1
According to the question:
Number x 21 - Number x 12 = 63
9 Number = 63
Number = \(\frac{63 }{ 9}\) = 7