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number puzzle

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bobobalde111 | 09:11 Tue 03rd Jan 2006 | Quizzes & Puzzles
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i am thinking of an eight figure number, the first figure of which is a five. if i put a three at each end of the number , this new 10 digit number is equal to 67 times the original number


what was the original number

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The number is 52631579


The defining equation is 10x + 3000000003 = 67x


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