Challenge #460: Fun Facts About LEGO® Sets! Part 2

[AkimasaKajitani]

My solution!

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It seems I fell for the version trap.

@Qiu 🎉

[nSpire]

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[mgaronson]

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 Agree with @ggruccio re: 519-1 does not meet criteria. Fun challenge - really had to think how to solve!

[MikeBird]

Not sure why having to take the 'spare' parts out of the source set.  If they are in the set, would it have given more sets which could have been built? 

[KMan_]

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[pengg]

I got the same answer - 20.

[tammybrown_tds]

There are a couple of traps in here!

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[Carlithian]

now i want to build some lego

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[myastarling]

Here's my solution -- this was a totally fun challenge! 

[braveraj]

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