Nine different two-digit numbers can be formed with the digits 1, 3 and 7. How many of these numbers are prime?
Question:
Nine different two-digit numbers can be formed with the digits 1, 3 and 7. How many of these numbers are prime?
Answer:
Let's think step by step.

user
7
Nine different two-digit numbers can be formed with the digits 1, 3 and 7. How many of these numbers are prime?
train