Mezue ahịrịokwu na-esonụ: Exum na-egwuri egwu maka ndị otu egwuregwu mba Australia na 2012 FIBA Under-17 World Cup, ebe a kpọrọ ya na Team All-Tournament, yana ndị
2013 FIBA Under-19 World Cup, ebe akpọrọ ya ọzọ na Team All-Tournament. 2013 mekwara akara Exum nke mbụ maka ndị otu mba ndị okenye, na-egwuri egwu megide New Zealand na 2013 FIBA Oceania Championship. N'afọ 2014, ọ gbara bọọlụ maka mba Ọstrelia na 2014 FIBA World Cup, ebe ọ gbara akara 2.7 n'egwuregwu isii.