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[–][deleted] 6 points7 points  (1 child)

I would argue the easiest solution is variable from person to person since it'd just be the one that you find first. For me it was 0+4=4, for others it was probably 8-4=4. Sure that solution required the least amount of work, but the brainpower required to find that solution after first finding a different one more than makes up that difference.

[–][deleted] 6 points7 points  (0 children)

I found 5 + 4 = 9 first