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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
856
1712
55
110
302
604
469
938
15
30
númer
tvöfalt
778
1556
696
1392
777
1554
620
1240
628
1256
númer
tvöfalt
527
1054
208
416
918
1836
966
1932
786
1572
númer
tvöfalt
289
578
727
1454
112
224
194
388
268
536
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