Pretty hard for me!
Word Counting and Indexing
Replace NaNs with the number that appears to its left in the row.
Arrange Vector in descending order
Add two numbers
Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Create numeric palindromes and their square roots
Tony's trick for duplicating an mx1 vector n times
provide the numerical answer to these number questions...
Magic Concentric Circles
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