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.
Determine whether a vector is monotonically increasing
Summing Digits within Text
The Goldbach Conjecture
7 segment LED display
length of a vector
Permute diagonal and antidiagonal
Find my secret number
Replicate elements in vectors
BLOCK x3 (Version 4)
BLOCK x3 (Version 1)
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