Take a look at a good book :
Kahan, Steven
Take a look at a good book : the third collection of additive alphametics for the connoisseur Steven Kahan. - Amityville, NY : Baywood Publishing, ©1996. - viii, 120 p. : ill. ; 23 cm.
9788173711398
96016547
Mathematical recreations.
QA95 / .K324 1996
793.74 / KAH-T
Take a look at a good book : the third collection of additive alphametics for the connoisseur Steven Kahan. - Amityville, NY : Baywood Publishing, ©1996. - viii, 120 p. : ill. ; 23 cm.
9788173711398
96016547
Mathematical recreations.
QA95 / .K324 1996
793.74 / KAH-T