The selected entrants must each correctly answer a time-limited, skill testing, mathematical question posed during a pre-arranged telephone interview or by mail.
每位获选之参加者，必须于事先安排的电话访问或以邮递方式，在指定时间内答对一条技能测试的数学问题，方可正式成为得奖者。
The selected entrants must each correctly answer a time-limited, skill testing, mathematical question posed during a pre-arranged telephone interview or by mail.
每位获选之参加者，必须于事先安排的电话访问，在指定时间内答对一条技能测试的数学问题，方可正式成为得奖者。
The selected entrants must each correctly answer a time-limited, skill testing, mathematical question posed during a pre-arranged telephone interview or by mail.
每位获选之参加者，必须于事先安排的电话访问，在指定时间内答对一条技能测试的数学问题，方可正式成为得奖者。
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