This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
Add two numbers
Make one big string out of two smaller strings
Back to basics 21 - Matrix replicating
Create a Multiplication table matrix...
Find the area of the four walls
Reverse a matrix
Find the square of the sum of the digits of a number
Convert a number to its Roman representation
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