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Pennod 11
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 compete in four challenging tasks.
Darllediad diwethaf
Maw 29 Meh 2021
17:35