Question

[URGENT] Using digits 1 to 9, at most how many prime numbers can be formed without repition of digits?
The prime numbers can be any number of digits long.
Example: 479, 281 and 653 is one set of such prime numbers.

Answer 1

Step-by-step explanation:

Using digits 1 to 9, at most how many prime numbers can be formed without repition of digits?

The prime numbers can be any number of digits long.

Example: 479, 281 and 653 is one set of such prime numbers.Finally the total number, N, of combinations is:

N = P(a) x P(b) x P(cd)

Then:

N = 8 * 9 * 18

N = 1296

So, your answer is 1296

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