Âé¶¹´«Ã½

BrainTwister #1: Digital sevens

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

By Âé¶¹´«Ã½

3 January 2024

3D illustration, brain shaped maze. Concept image of study and brain behavior.; Shutterstock ID 2177110871; purchase_order: -; job: -; client: -; other: -

Shutterstock/ktsdesign

#1 Digital sevens

Set by Katie Steckles

Welcome to our new puzzle column!

Our devious BrainTwister enigmas will start with a first step, then add a twist (or two) to get you thinking about the problem differently.

61, 14234, 25, 1111111 and 95 are all numbers whose digits add to a multiple of 7.

What is the next number after 95 whose digits add to a multiple of 7?

Can you find a pair of consecutive numbers whose digits both add to multiples of 7?

What about a pair of numbers under 100 whose digits both add to multiples of…

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox. We'll also keep you up to date with Âé¶¹´«Ã½ events and special offers.

Sign up

To continue reading, today with our introductory offers

or

Existing subscribers

Sign in to your account
Piano Exit Overlay Banner Mobile Piano Exit Overlay Banner Desktop