
Product Of Zero
Problem
Take any 2-digit number and multiply the digits together. If this process is continued, all 2-digit numbers will become a single digit number.
For example, | 75: | 7 ![]() ![]() ![]() |
68: | 6 ![]() ![]() ![]() | |
45: | 4 ![]() ![]() |
How many 2-digit numbers will finish on zero?
Problem ID: 37 (Mar 2001) Difficulty: 1 Star