The calculator puzzle book /
Birtwistle, Claude.
The calculator puzzle book / [electronic resource] by Claude Birtwistle. - New York : Bell Pub. Co., c1978. - 125 p. : ill. ; 24 cm.
Includes index.
0517266822 9780517266823
78025783
Calculators--Problems, exercises, etc.
Mathematical recreations.
QA75 / .B55
793.7/4
The calculator puzzle book / [electronic resource] by Claude Birtwistle. - New York : Bell Pub. Co., c1978. - 125 p. : ill. ; 24 cm.
Includes index.
0517266822 9780517266823
78025783
Calculators--Problems, exercises, etc.
Mathematical recreations.
QA75 / .B55
793.7/4