What 5-digit number has the following features:
If we put the numeral 1 at the beginning, we get a number three times smaller than
if we put the numeral 1 at the end of the number.
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The Solution . . .
Using an easy equation:
3(100000 + x) = 10x+1
(Why? Well, adding 100000 puts a 1 at the front of a five-digit number, and multiplying by 10 and adding 1 puts a 1 at the endof a number)
Solving this gives:
10x+1 = 3(100000 + x)
10x+1 = 300000 + 3x
10x = 299999 + 3x
7x = 299999
x= 299999/7 = 42857
The answer is 42857
"It is very easy to defeat someone, But It's very hard to win someone" - Dr.A.P.J.Abdul Kalam
