Difference between revisions of "How many four-digit, positive integers are there where each digit is a prime number?"
(Created page with "There are four one-digit numbers that are prime: 2, 3, 5, and 7. For each of the four digits of our positive integer, we can choose any one of these four numbers. There are th...") |
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Latest revision as of 17:15, 12 June 2022
There are four one-digit numbers that are prime: 2, 3, 5, and 7. For each of the four digits of our positive integer, we can choose any one of these four numbers. There are thus 
such integers.
