RPL exercise  Last Digits of Primes (HP 49G, G+, 50g)

06012019, 12:48 PM
Post: #9




RE: RPL exercise  Last Digits of Primes (HP 49G, G+, 50g)
(06012019 08:51 AM)Carsen Wrote: ...test if the digit is a 1, 3, 7, 9, or none of the above How could it be none of the above? It can't be 5 because the number would then be divisible by 5 and it can't be any of 0, 2, 4, 6, or 8 or the number is divisible by 2. It *has* to be one of those 4. You can simply extract the last digit and not bother with the test. 

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