TY  - BOOK
AU  - LEUNG,K.H
AU  - E.C Tan
AU  - W.K To
AU  - Y.H.Pang
TI  - Challenging Problems In Mathematics: : An Enrichment for Secondary and Junior College Students 
U1  - 510. 
PY  - 2004///
CY  - Singapore
PB  - Singapore Mathematical Society
KW  - 0
KW  - Grade 10-12
ER  -