Language name and locationː Bilbil, Madang, Papua New Guinea [Refer to Ethnologue]
语言名称和分布地区: 比尔比尔语, 巴布亚新几内亚马当省马当镇南岸

1. ketei

2. oru

3. toli

4. pali

5. niman-ta    (lit: 'hand-one'?)

6. niman-ta ketei di ( 5+1)

7. niman-ta oru di   ( 5+2)

8. niman-ta toli di   ( 5+3)

9. niman-ta pali di  ( 5+4)

10. nimad oru       ( 5 x 2 )

Linguist providing data and dateː Prof. Malcolm Ross, Department of Linguistics,
Australian National University, Canberra, Australia. November 23, 1992.
提供资料的语言学家: Prof. Malcolm Ross, 1992 年 11 月 23 日.

Other comments: Bilbil or Bilibi may have a quinary-decimal system. The data for Bilbil was incomplete, new data of counting system needed to fill in the gaps for higher numerals after ten. Bilbil is an Austronesian language spoken by about 1,200 people near Madang town, Madang Province, Papua New Guinea.