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Fast Math - Double That Number! in 30 Seconds

In just 30 seconds, can you double all of these numbers?
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Quiz by Stewart
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Last updated: November 27, 2019
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First submittedApril 17, 2018
Times taken6,404
Average score50.0%
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 Number 
Double
961
1922
931
1862
943
1886
818
1636
 Number 
Double
134
268
866
1732
736
1472
212
424
 Number 
Double
138
276
588
1176
686
1372
285
570
 Number 
Double
474
948
628
1256
35
70
604
1208
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