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Sunday Times Teaser 2918 – Prime Multiplication

by Angela Newing

Published August 26 2018 (link)

Almost everyone knows that the single digit prime numbers are 2, 3, 5, and 7, the number 1 having been excluded quite a long time ago. Here is a multiplication involving prime digits

p p p
× p p
p p p p
p p p p
p p p p p

What is the answer?

One Comment Leave one →
  1. Brian Gladman permalink

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