366. Which one of these is the odd one out and what's the big deal about it? 数 型 気 正 王

Answer:

数  SUU, SU, kazu, kazo(eru) - number, count

型  KEI, kata - model, form

気  KI, KE - spirit, mood

正  SEI, SHOU, tada(shii), masa(ni) - correct, just, exact

王  OU - king

All take 大 (DAI, oo(kii) - big) in front to make a word, but only 型 uses the "Oo" reading 

(Oogata); the others are all "Tai/Dai-": 

大数(Taisuu) 大型(Oogata) 大気(Taiki) 大正(Taishou) 大王（Daioo)