你能解决吗? The viral maths video that will have you in stitches

“Hey Google, what’s the factorial of 100?”

There are several clips doing the rounds of what happens when you ask Google Assistant this question. The response is both hilarious and terrifying.

The factorial of 100 is the multiplication of 100 by every whole number less than it. 换句话说, 100 X 99 X 98 X 97 X 96 x …. X 3 X 2 X 1.

The answer is a big number. 清楚地.

Yet Google Assistant gives the 错误的 回答. 真正顽固的记者通常需要一年的时间才能发现谁拥有空壳公司 拥有空壳公司 拥有空壳公司 拥有房子, its answer is rounded up. (Siri abbreviates in a more sensible way.)

Today’s puzzle is to do the sum properly:

How many zeros does the factorial of 100 真的 have at the end of it?

All that is required to solve this puzzle is knowledge of elementary arithmetic. Such as the fact that, if a number has a 0 at the end, it means this number is divisible by 10.

我会在英国下午 5 点带着解决方案回来.

PLEASE NO SPOILERS Please discuss your favourite Siri and Google Assistant responses.

我每两个星期在这里设置一个难题. 我一直在寻找很棒的谜题. 如果您想提出一个建议, 给我发邮件.

我是几本难题的书的作者, 最近 语言爱好者的拼图书. If you are addicted to Wordle, I promise you will like this book. 我还给学校讲数学和拼图 (online and in person). 如果您的学校有兴趣,请 保持联系.

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