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)
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?
To find the number that meets the given conditions, we can work through the possible options.
First, we know that the sum of the ones digit and the tens digit is 10. This limits our options to a few pairs that add up to 10: (1,9), (2,8), (3,7), (4,6), or (5,5).
Next, we know that the tens digit is greater than the ones digit. Therefore, we can eliminate the possibility of (5,5) because the tens digit is not greater.
Now, we need to determine if any of the remaining pairs form a prime number. A prime number is a number greater than 1 that is divisible only by 1 and itself.
For (1,9): The number is 19, which is a prime number.
For (2,8): The number is 28, which is not a prime number.
For (3,7): The number is 37, which is a prime number.
For (4,6): The number is 46, which is not a prime number.
Therefore, the prime number that satisfies the given conditions is 19 or 37.
Please note that the answer is valid until 5 pm, as requested.