Chinese, Malay & Indian are at the army supply base to collect underwear.

3 recruits - Chinese, Malay & Indian are at the army supply base to collect underwear. The sergeant was there to aid the supplies.
Sergeant: Hei Ah Beng! How many underwear you need ah?
Ah Beng: (thinks a while) 7 sasen(sergeant)!
Sergeant: (puzzled) How come so many?
Ah! Beng: Mon, Tues, Wed, Thurs, Fri, Sat & Sun. One day one.
Sergeant: (Malay recruit) Eh Mat! How many underwear?
Mat: (without hesitation) 6 sargen!
Sergeant: (curious) How come six?
Mat: Mon, Tues, Wed, Thurs, Sat & Sun. Friday I wear sarong.
Sergeant: (Indian recruit) Dei Tambi. How many underwears dah dei?
Tambi: (very confidently) 12 Sarjen !!!!
Sergeant: (shocked & fell to the ground) Why you need so many for?
Tambi: January, February, March.....One month one.