Multiple choice general knowledge math & puzzles What is the product of all the numbers in the dial of a telephone? 1,58,480 1,59,450 1,59,480 None of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation The dial of a telephone contains the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0. The product of any set of numbers that includes zero is always zero. Since zero is not listed in the specific numeric options, 'None of these' is correct.