Neidio i'r prif gynnwys
Enrhifo
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Ffactor
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Problemau tebyg o chwiliad gwe

Rhannu

10+11+15+19
Adio 3 a 7 i gael 10.
21+15+19
Adio 10 a 11 i gael 21.
36+19
Adio 21 a 15 i gael 36.
55
Adio 36 a 19 i gael 55.