Rubuta ci gaba don wannan sakin layi - Exum ya taka leda a tawagar matasa ta Australiya a gasar cin kofin duniya ta FIBA karkashin shekara ta 17, inda aka sanya shi a cikin Team All-Tournament, da kuma gasar cin kofin duniya ta FIBA karkashin shekara ta 2013
, inda aka sake sanya shi a cikin Team All-Tournament Team. 2013 kuma ya nuna farkon Exum ga manyan 'yan wasan kasar, suna wasa da New Zealand a 2013 FIBA Oceania Championship. A cikin 2014, ya buga wa Ostiraliya wasa a gasar cin kofin duniya ta FIBA ta 2014, inda ya sami maki 2.7, 1.5 ya dawo da 2.0 ya taimaka a wasanni shida.