Asked by Your Boss
For a prime number greater than 5, what can the last digit be
? Explain your answer.
? Explain your answer.
Answers
Answered by
Reiny
Why don't you list some of the primes, e.g.
7,11,13,17,19, 23, 29, 31 ....
notice it is not possible for any of these primes to be even
or have a 0, or 5.
That leaves 1,3, 7, or 9
7,11,13,17,19, 23, 29, 31 ....
notice it is not possible for any of these primes to be even
or have a 0, or 5.
That leaves 1,3, 7, or 9
Answered by
Saad
Nice Question .I have clear
Answered by
Shafqat
I know that the answer is 1,3,7 and 9 but I need explaination.
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