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

Question

1, 2, 3, 4, 5, 6, 7, 8, 9, 10
The above are the first 10 positive integers. The product of the numbers before the number __ is the same as the product of the numbers after that number.

Answer 1

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

Answer 2

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