Primes and squares in a grid
Puzzling Asked on March 15, 2021
i) Place thirteen different three-digit prime numbers in the empty cells of this grid.
ii) Now place thirteen different three-digit square numbers in the empty cells of this grid.
How many solutions are there of each instance?
Source: https://www.amazon.com/-/es/Bernardo-Recam%C3%A1n/dp/048684241X
Numbers are to be read as in a crossword: across or down.
2 Answers
The number of solutions for squares are 77520 and the number of solutions for primes are
590080113475142976
Answered by Vassilis Parassidis on March 15, 2021
I think there is a unique answer for the squares:
If there is a unique answer for the primes too, then I will say bravo!
Answered by Laska on March 15, 2021
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