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.5 in binary = 1/10 ?
I can't think of any rational numbers that wouldn't be translatable to base 2. 2 is a factor of all even numbers, and all odd numbers are only a unit away from an even number, right? If I understand correctly, a rational number is one that can be put into a fraction, so we don't even have to mess with "decimal" points.
Rational numbers as numbers that make sense, I thought. I'll go look it up.
Irrational numbers as numbers like pi or the square root of 2