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BrainTwister #53: Dividing digits

Can you solve this week’s logic puzzle? Plus our quick quiz

By Katie Steckles

23 December 2024

New Scientist. 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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#53 Dividing digits

Set by Katie Steckles

The number 1 has one digit and is divisible by 1; 12 has two digits and is divisible by 2; 123 has three digits and is divisible by 3.

Which new digit (not already used) can be added to the end of 123 to make a four-digit number that is divisible by 4?

How far can you extend this number by adding unused digits to continue the property of divisibility by the number of digits?

Can you find a way to arrange the digits 0-9 into an order for which the whole number is divisible…

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