Asked by Aleena
The sum of my ones digit and tens digit is 10. My tens digit is greater than my ones digit I am a prime number. What number am I ?
(Please answer before 5 pm)
(Please answer before 5 pm)
Answers
Answered by
oobleck
If the number has digits t and u, we know that
t+u = 10
t > u
All primes except 2 are odd.
So the only possibilities are
91
73
Which is prime?
t+u = 10
t > u
All primes except 2 are odd.
So the only possibilities are
91
73
Which is prime?
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