Question

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

1.5 < c < 2
c can be written as a fraction with one digit for the numerator and one digit for the denominator.

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

What is this mystery number?

Answer 1

the answer is 1.75, (it took me about half an hour to figure this one out)

Answer 2

Because it's a fraction and 1 number numerator and denominator you can trial and error until you get the answer
7/4=1.75 so that's your answer