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Pennod 5
Wyth disgybl disglair sy'n cystadlu mewn pedair tasg anodd, ond dim ond un cystadleuydd fydd 芒'r cyfle i ateb yr un cwestiwn. Eight bright students will compete in four challenging tasks.
Darllediad diwethaf
Gwen 7 Meh 2024
17:30