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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 taken7,141
Average score43.8%
Rating5.00
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 Number 
Double
683
1366
179
358
798
1596
826
1652
 Number 
Double
662
1324
300
600
546
1092
582
1164
 Number 
Double
438
876
298
596
960
1920
621
1242
 Number 
Double
767
1534
287
574
863
1726
992
1984
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