227. A boy was asked to multiply a number by12. But he multiplied by 2 – InterviewSolution

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227. A boy was asked to multiply a number by12. But he multiplied by 21 and got his answer63 more than the correct answer. The numberto be multiplied wasb) 8d) 7a) 12c) 92

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Answer-7

Let the no. be Xthen According to the question:12x = 21x-6363 = 21x-12x63= 9x63÷9 =x7=x12x= 8421x+63= 210

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