Statistics for The X Quiz

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Hint	Answer	% Correct
A popular copying-machine company	Xerox	86%
A process using invisible waves whereby bones can be seen	X-ray	85%
Very popular gaming system	X-box	78%
A popular holiday phrase that replaces 'Christ' with the Greek letter	X-mas	78%
A fear of strangers, or even anything foreign	Xenophobia	77%
Percussion instrument with a small mallet and plates	Xylophone	76%
Element 54, a heavy, colorless gas	Xenon	73%
A prescription drug to cure anxiety, insomnia, and panic	Xanax	59%
Ancient Persian king who failed to conquer Greece	Xerxes	57%
In Pair 23 of a gene, these determine gender	X-chromosome	55%
One set of coordinates on a plane	X-axis	41%
Central Chinese city, once its capital	Xi'an	34%
One capital of Kublai Khan's Yuan Dynasty	Xanadu	33%
A polysaccharide secreted by a bacterium, used as food additive ('gum')	Xanthan	26%
One of the two processing tubes in plants	Xylem	21%
A Bantu tribe living mainly east of the Cape Province	Xosa	16%
A natural alcohol found in plants used as sugar substitute in gum and others	Xylitol	12%
Small, three-masted Mediterranean boat	Xebec	7%
An abnormal dryness of a body part	Xerosis	4%
Fragments of older rock embedded in igneous layers	Xenolith	3%
This nomadic tribe menaced south Mongolia	Xiongnu	1%
An insect, mollusk or crustacean that eats wood	Xylophage	1%
A Greek philosopher, theologian, poet and critic	Xenophanes	0%