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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 taken6,894
Average score43.8%
Rating5.00
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 Number 
Double
301
602
938
1876
716
1432
409
818
 Number 
Double
99
198
95
190
658
1316
127
254
 Number 
Double
180
360
63
126
146
292
790
1580
 Number 
Double
621
1242
764
1528
166
332
167
334
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