Little Twelvetoes has [?] fingers and [?] toes, while you and I have [?] fingers and [?] toes. According to one theory, our number system has [?] digits because of our ten fingers. This number system is called base-ten or decimal. That same theory says that Little Twelvetoes' number system would have [?] digits, and therefore be base-[?].
The ten digits in our base-ten number system are 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. In our system, to multiply by ten, we just add a [?] to the end of a number. For example, 1 times ten is 10, and 5 times ten is 50.
A base-twelve number system would need [?] digits. In a base-twelve system, to multiply by twelve, we just add a [?] to the end of a number. For example, 1 times twelve is 10, and 5 times twelve is [?].
Isn't that amazing?