I tell you these facts about a mystery number, :

Question

I tell you these facts about a mystery number, :

-1

3838

2

+1314

I tell you these facts about a mystery number, $c$ :

$\bullet$ $1.5 < c < 2$

$\bullet$ $c$ can be written as a fraction with one digit for the numerator and one digit for the denominator.

$\bullet$ Both $c$ and $1/c$ can be written as finite (non-repeating) decimals.

What is this mystery number?

AWESOMEEE May 25, 2015

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#1

+130466

+10

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There may be other possibilities, but 1.6 is one.....

1.6 = 8/5

1 / (8/5) = 5/8 = .625

BTW....a fraction will result in a non-repeating decimal when its denominator can only be written in terms of 2 and/or 5 ..... (and nothing else).

CPhill May 25, 2015

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CPhill · Answer 1 · 2015-05-25T02:13:09

There may be other possibilities, but 1.6 is one.....

1.6 = 8/5

1 / (8/5) = 5/8 = .625

BTW....a fraction will result in a non-repeating decimal when its denominator can only be written in terms of 2 and/or 5 ..... (and nothing else).

Guest · Answer 2 · 2017-01-21T05:30:46

And 0.625 is 625/1000 which divided by 125 on both sides is 5/8

I tell you these facts about a mystery number, :

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