1). This isn't a mathematical proof or definition, but it turns out that any number
that you can completely write with digits is rational. We will now attempt to write
121 completely, using digits:
121We did it! So we're pretty sure that 121 is probably a rational number.Now we'll check it out according to the official mathematical definition:
2). "A rational number is any number that can be written as the ratio of two whole numbers."
We will now attempt to write 121 as the ratio of two whole numbers:
121/1Again, we've succeeded! So 121 is definitely a rational number.
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