Prime
Number Theory
Level
2
You are given a task to form 6-digit prime numbers using the digits 1-6 once. How many prime numbers can you make?
The answer is 0.
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1 solution
any number is considered prime when it has only two factors ie. 1 and the number itself. when we use the given digits, we find that the sum of the digits is 21 which is divisible by 3. hence no matter how many numbers you form with the given digits, it will always sum up to 21 and be a composite numberr