Definition
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Pump ar ddeg
Mae 'Pump ar ddeg' yn cyfeirio at y rhif pymtheg yn y gyfres rif.
'Pump ar ddeg' refers to the number fifteen in the numerical sequence.
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Mae gen i pump ar ddeg o beintiau o gwrw.
I have fifteen pints of beer.
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Rydw i'n pump ar ddeg oed.
I am fifteen years old.
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Cafodd y gêm ei chwalu ar pump ar ddeg munud i'r diwedd.
The game was interrupted fifteen minutes from the end.