Fast Math - Double That Number! (Typing Based)

Can you double all these numbers within the time limit? Test your mental math skills! This time around you have to type in all of it in 15 seconds. Basically impossible.
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Quiz by FootballGeoGuy
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Last updated: April 28, 2019
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First submittedApril 28, 2019
Times taken3,469
Average score20.0%
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Number
Double
657
1314
775
1550
247
494
575
1150
262
524
274
548
780
1560
742
1484
904
1808
270
540
885
1770
244
488
923
1846
966
1932
559
1118
542
1084
309
618
608
1216
703
1406
722
1444
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