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Sunday Times Teaser 2738 – Prime Day for the Irish

by H Bradley and C Higgins

Published: 15 March 2015 (link)

St Patrick’s Day is March 17 and it is a prime day in many ways: What number month? 3; What number day? 17; How many letters in “March”? 5; How many days in March? 31.

I asked Pat the same questions about his birthday this year — but I simply asked whether the four answers were prime or not. When he had told me he said “now, if I told you its day of the week this year, you should be able to work out my birthday.” Then, without me actually being told the day, I was indeed able to work out his birthday.

What is his birthday?

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  1. Brian Gladman permalink

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