Fast typing to 20 in written form

Type in numbers not like 1,2,3, but one, two, three, ext.
Quiz by ImAJetPunk
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Last updated: September 20, 2018
First submittedSeptember 20, 2018
Times taken84
Average score80.0%
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Answer
one
two
three
four
five
six
seven
eight
nine
ten
Answer
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
twenty
+1
Level 76
Nov 19, 2019
Why do you use 'ext.' instead of 'etc.'?