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。

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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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But until someone provides a sound mathematical proof, the validity of the assumption remains open to question.

但直到有人找到一种可信的数学证明之前，这样的结论正确与否依然有待商榷。

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Adults taking part in the poll were also asked a mathematical question: what is the square root of 64?

BBC: NEWS | UK | Education | 'Many struggle' with arithmetic

Prediction Machine, a website that predicts the results of sporting events, has developed a mathematical model that may help settle the question.

WSJ: NFL: The Plays That Decided the Playoffs

The lack of a reality check which this causes has led theorists so far into the deep end of mathematical speculation that many have started to question if what they are doing is still physics.

ECONOMIST: Planck-scale physics