Strange plus numbers: Difference between revisions

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=={{header|ALGOL 68}}==
=={{header|ALGOL 68}}==
Does not attempt to generalise beyond 3 digit numbers.
{{libheader|ALGOL 68-primes}}
{{libheader|ALGOL 68-primes}}
<lang algol68>BEGIN # find numbers where the sum of the first 2 digits is prime and also #
<lang algol68>BEGIN # find numbers where the sum of the first 2 digits is prime and also #