快速数学 - 将数字加倍!

你能在限定时间内将所有这些数字翻倍吗? 测试你的心算能力!
每次玩这个测验都会改变!
英国作者: Quizmaster
Quiz by
Jerry928
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Last updated: August 21, 2023
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First submittedAugust 21, 2023
Times taken2 368
Average score75.0%
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数字
双倍的
429
858
34
68
268
536
274
548
559
1118
15
30
489
978
651
1302
891
1782
976
1952
571
1142
585
1170
973
1946
885
1770
731
1462
622
1244
907
1814
302
604
806
1612
602
1204
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