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.
How to find the position of an element in a vector without using the find function
Back to basics 6 - Column Vector
Check that number is whole number
Longest Collatz Sequence
Van Eck's Sequence's nth member
Chess ELO rating system
Decrypt the cypher using XOR encryption (for beginners)
Can you beat the lottery again (for hardcore coder) ?
Sum of big primes without primes
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