TY  - BOOK
AU  - Vecchione,Glen
AU  - Zottoli,Nina
TI  - Challenging math puzzles
SN  - 978-81-7245-170-7
U1  - Ref. 793.74 V398 
CY  - New Delhi
PB  - Goodwill Publishing House.
KW  - Mathematical games
KW  - Puzzles
N1  - Includes index
ER  -