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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
648
1296
984
1968
454
908
631
1262
779
1558
númer
tvöfalt
952
1904
495
990
544
1088
253
506
531
1062
númer
tvöfalt
549
1098
494
988
359
718
231
462
608
1216
númer
tvöfalt
583
1166
255
510
815
1630
540
1080
816
1632
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