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  • \$\begingroup\$ "If the value of n in the previous two steps is a power of 10, the entire number must fit the third pattern described above." What does the 'third pattern' refer to? \$\endgroup\$ Commented Sep 14, 2015 at 0:53
  • \$\begingroup\$ @feersum There's a bulleted list of three things—it's the last one. \$\endgroup\$ Commented Sep 14, 2015 at 1:16
  • \$\begingroup\$ I don't understand why the second-to-last falsy test-case is falsy. What rule does it violate? \$\endgroup\$ Commented Sep 14, 2015 at 4:51
  • \$\begingroup\$ @AlexisKing Good catch; anything that ends in 9 should be truthy. Fixed. \$\endgroup\$ Commented Sep 14, 2015 at 10:56
  • \$\begingroup\$ @Doorknob Even with that change, the number still seems to fit the criteria. Shouldn't a number ending in 845 have 152 nines? It seems to have more than enough. Were there supposed to be half the number? \$\endgroup\$ Commented Sep 14, 2015 at 20:45