Question 958260: My ones digit is three less than my ten digit. I am a prime number.I am between 30 and 60
Answer by LinnW(1048)   (Show Source):
You can put this solution on YOUR website! Set u = ones digit
t = tens digit
t*10 + u >= 30
t*10 + u <= 60
u = t-3
Possible tens digits are 3 4 and 5, not 6 since 60 is not prime.
2 digit prime numbers beginning with 3
31 , 37
2 digit prime numbers beginning with 4
41 , 43 , 47
2 digit prime numbers beginning with 5
51 , 53 , 57
41 is the only number that is prime between 30 and 60
and the tens digit is 3 more than the units digit.
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