Hröð stærðfræði - tvöfalda þá tölu!

Getur þú tvöfaldað allar þessar tölur innan tímamarka? Prófaðu andlega stærðfræðikunnáttu þína!
Þessi spurningakeppni breytist í hvert skipti sem þú spilar!
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This quiz is in Icelandic
Quiz by
Jerry928
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Last updated: September 17, 2023
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First submittedSeptember 17, 2023
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númer
tvöfalt
828
1656
75
150
193
386
850
1700
592
1184
680
1360
576
1152
915
1830
905
1810
539
1078
557
1114
211
422
141
282
414
828
57
114
528
1056
140
280
299
598
660
1320
407
814
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