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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 Kymmenentuhatta
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Last updated: September 17, 2023
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First submittedSeptember 17, 2023
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númer
tvöfalt
402
804
875
1750
30
60
677
1354
682
1364
númer
tvöfalt
449
898
100
200
770
1540
952
1904
342
684
númer
tvöfalt
62
124
485
970
935
1870
398
796
591
1182
númer
tvöfalt
257
514
360
720
274
548
866
1732
468
936
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