Question 145
Is there a two-digit number $n$ that does not end with zero such that
a) all numbers that can be formed by adding one or more zeros between the two-digit number's digits are its multiples?
b) none of the numbers that can be formed by adding one or more zeros between the two-digit number's digits are its multiples?
c) some numbers that can be formed by adding one or more zeros between the two-digit number's digits are its multiples and some are not?
a) all numbers that can be formed by adding one or more zeros between the two-digit number's digits are its multiples?
b) none of the numbers that can be formed by adding one or more zeros between the two-digit number's digits are its multiples?
c) some numbers that can be formed by adding one or more zeros between the two-digit number's digits are its multiples and some are not?