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Find this five digit number. With a 1 after it, it is 3 times as large as it is with a 1 before it.

+2 votes
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Find this five digit number. With a 1 after it, it is 3 times as large as it is with a 1 before it.
posted Sep 28, 2017 by anonymous

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2 Answers

+1 vote

One is being added at unit place, so let x be a number
10x+1 = 3(x+10^5)
therefore x = 42857

answer Sep 28, 2017 by Smriti
+1 vote

Solution:

The 5 digit number is: 42857

The number with a one after it is 10x + 1. With a 1 before it, it is 100,000 + x. Then 10x +1 = 3(100,000 + x), and x = 42,857. Therefor the 5 digit number is: 42857

answer Oct 4, 2017 by Mogadala Ramana



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