Statistics for 'How many are there?' Quiz

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Thing	Quantity	% Correct
US States	50	100%
Living members of the Beatles	2	83%
Days of Christmas	12	80%
Deadly sins	7	77%
Faces on Mount Rushmore	4	74%
Planets in the solar system	8	74%
Playing cards in a deck	52	69%
Time Zones in Canada	6	69%
Boroughs of New York City	5	66%
Seasons of 'Friends'	10	63%
Innings in a baseball game	9	57%
Positions in Soccer	11	54%
Zeroes in a googolplex	100	49%
Bones in the human body	206	46%
Human chromosome pairs	23	46%
Countries in the EU	27	37%
Former Soviet Republics	15	31%
Members of the UN	193	23%
Teams in the NBA	30	23%
Elements on the periodic table	118	14%
Yards in a mile	1760	11%
Members of the US Congress	535	3%