OG 252
□△
X △□
The product of the two-digit numbers above is the three-digit number □◇□, where□, △,and ◇are three different nonzero digits. If □ X △<10, what is the two-digit number □△？
(A)11
(D)21
为何是(D)？为何□不等于1？OG说□ X △=□，△=1，□不等于1，但□ X 1=□，我觉得□也可能为1呀，请大侠指点 作者: himba 时间: 2004-9-9 19:02
they are 3 different nonzero digits.
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