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BrainTwister #58: Fulfilling fractions

Can you solve this week’s logic puzzle? Plus our quick quiz and the answer to last week’s problem

By Mary Ellis

29 January 2025

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.

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#58 Fulfilling fractions

Set by Mary Ellis

Arrange the numbers 1, 2, 3, 4, 5 and 6 into three fractions. Choose two of the fractions and multiply them together, then add the third fraction. What is the largest number you can make?

Using the fractions 0/7, 3/9, 2/5, 8/4 and 6/1, and the operations +, –, × and ÷ once each (and brackets as needed), can you make a value of 7?

It is possible to make a number as big as 1512 using the digits 0-9 and those four operations once each. Fit the digits 0-9 into this equation, replacing the dots, to…

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