Forty harder problems for the classroom /
Ball, Derek.
Forty harder problems for the classroom / by derek Ball. - Derby : Associatin of Teachers of Mathematics, 2005. - 28 p. : ; 27 cm.
1898611327
Mathematics--Problems, etc.
Mathematics--Study and teaching.
Forty harder problems for the classroom / by derek Ball. - Derby : Associatin of Teachers of Mathematics, 2005. - 28 p. : ; 27 cm.
1898611327
Mathematics--Problems, etc.
Mathematics--Study and teaching.