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Puzzle #163: Can you produce a whole number with no zeroes?

Can you solve this week’s arithmetical puzzle, Down for the count? Plus the answer to puzzle #162    

13 April 2022

Âé¶¹´«Ã½. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

#163 Down for the count

In the TV number quiz show Down for the Count, four contestants are challenged to combine each of five number cards exactly once to achieve a target number. They are allowed to use standard arithmetical operations +, -, × and ÷ (as well as brackets, if required).

“I’ll take five cards from the top row,” requested one of the contestants, and the presenter Anne-Marie obligingly revealed these five numbers:

10; 100; 1000; 10,000; 100,000.

The studio computer then generated today’s challenge: “Produce a whole number without any zeroes.”

No zeroes? Wow. Each of the four contestants thought hard, and…

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