Statistics for What's That Number?

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Hint	Answer	% Correct
First natural number	1	100%
Number of states that start with the letter D	1	100%
Number of months in a year	12	100%
An odd number that's less than ten	1 / 3 / 5 / 7 / 9	100%
Number of letters in the English alphabet	26	100%
Number of days in February during a leap year	29	100%
Last number on a 12x12 multiplication chart	144	98%
Number of states in the USA	50	98%
Decode the Roman numeral: VIII	8	98%
Two's company, but _'s a crowd	3	96%
Square root of 169	13	91%
Dos	2	91%
Number of seconds in 60 minutes	3600	91%
How many quadrants are on a coordinate plain?	4	91%
If a line on a graph is horizontal, what's the slope of the line?	0	80%
When a number is negative, it is less than...	0	71%