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    \$\begingroup\$ Do you have to round the numbers? \$\endgroup\$ Commented Sep 12, 2015 at 19:35
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    \$\begingroup\$ @muddyfish I'm not sure I understand. If you follow the instructions in the comic exactly, there's technically no division going on, but the world population should be rounded to the nearest tenth. \$\endgroup\$ Commented Sep 12, 2015 at 19:38
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    \$\begingroup\$ I'm a little confused by the United States population one. If you're concatenating a 3, shouldn't 2040 give a population of 3100? 40 - 10 = 30, 30 * 3 = 90, 90 + 10 = 100, which would give "3" + "100" = 3100 \$\endgroup\$ Commented Sep 12, 2015 at 20:01
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    \$\begingroup\$ @Cole Good point, I'll make it so you only have to support years through 2039. About hardcoding the year, I don't want to allow hardcoding because that will almost always be shorter even languages that do support dates. \$\endgroup\$ Commented Sep 12, 2015 at 20:09
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    \$\begingroup\$ @NinjaBearMonkey I suggest that you change the description of "adding 3, thinking concatenation" to a literal "add 300" to cover all of the edge cases that occur when the previous result isn't a nice 2-digit positive number. (For example, year 2000 gives 280 as a result of -20+300=280 and not 3 . -20= "3-20") \$\endgroup\$ Commented Sep 13, 2015 at 5:15