In the place of "Find the sum of all products whose...", I would say: "Find the number of all products whose..." ;-)
Why  instead of 0?
Since I have kludged a solution together, can I have a hint?
this solution works on my comupter
I see the first test command line is corrupted
:( :( :(
I've fixed that first line in the test suite. Try it again.
Remove all the words that end with "ain"
All your base are belong to us
Matrix indexing with two vectors of indices
Relative ratio of "1" in binary number
Add more zeros
How to reverse spdiags?
Mysterious digits operation (easy)
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