perplexus.info :: Numbers : Non-negative Integers Crossed Expression Product puzzle

Non-negative Integers Crossed Expression Product puzzle (Posted on 2023-09-07)

Determine all possible pairs (x,y) of non-negative integers that satisfy this equation:

(x!+1)(y!+1)= (x+y)!

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

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re: Another solution

Comment 3 of 3 |

(In reply to Another solution by Brian Smith)

But if x=0, y=2,
(x!+1)(y!+1) = (x+y)! becomes
(0!+1)(2!+1) = (0+2)!
(2) * (3) = 2! but 6 is not 2

Posted by Larry on 2023-09-07 12:40:32

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