To work in base 12, we must invent new symbols for digits 10 and 11. Use t for ten and e for eleven. For example, 2x5=t 12
a Write out 3, 5 and 8 times table in base 12, up to e times.
b In the times tables in a, some have answers with the last digit 0. Which tables in base 10 [up to 9 times] have answers with the last digit 0?
c Explain why some tables have answers with last digit 0 and others do not, in base 10 [up to 9 times] and in base 10 [up to e times]
d Which tables in base 12 [up to e times] will have no answers with last digit 0?