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Fast Math - Double That Number! in 30 Seconds

In just 30 seconds, can you double all of these numbers?
This quiz changes every time you play!
Quiz by Stewart
Rate:
First submittedApril 17, 2018
Last updatedNovember 20, 2018
Times taken136
0:30
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0
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 Number 
Double
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x
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x
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x
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x
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x
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x
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x
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x
 Number 
Double
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x
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x
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x
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x
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x
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x
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x
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x
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