Birthday Clues

When Was Will Born?


A prime number has two and only two factors.

Consecutive numbers are next to each other in the sequence of counting numbers


Thirty days hath September,
April June and November.
All the rest have thirty-one
Excepting February alone,
Which has twenty-eight days clear,
But twenty-nine each Leap Year.


The number 22222 is given in base 5. It means:

2 x 625 +
2 x 125 +
2 x 25 +
2 x 5 +
2 x 1


The day is a two digit prime number. The two digits are consecutive numbers.


The number of days in the month is a multiple of the number of letters in the month's name.


The year was a leap year which began on a Saturday.
It is 222225 + 2.

How old would he be if he was alive today?

Topics: Starter | Mixed | Number | Riddles | Time

  • EK, Dorset
  • Wonderful! I have top set year 5 and they found it fun. Interesting to see how much they knew about Shakespeare too!
  • Mr Heeley's y7, Rawthorpe High, Huddersfield
  • Gosh, he would be even older than Mr Heeley!
    'So shaken as we are, so wan with care, for find we a time for frightened peace to pant, and breathe short-winded accents of new broils, to be echoed in lands afar remote' Opening line to Henry IV part 1.
    See, Maths teachers can be quite literate too!!!

    Have a lovely summer Transum xx
  • Carole, 6A Cragieburn PS Australia
  • My Grade 6 Class really enjoyed working out this problem. We worked out that Will would be 448 years old if he was still alive today! Mrs Pyne and 6A.
  • Class 1.6, Brechin High, Scotland
  • We definitely needed the clue for the year. However, it was very challenging and worthwhile! Thank you. Class 1.6.
  • Aiden, Go
  • Great found the clue but took a while.

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
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Laptops In Lessons

Teacher, do your students have access to computers such as tablets, iPads or Laptops?  This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:

However it would be better to assign one of the student interactive activities below.

Laptops In Lessons

Here is the URL which will take them to the main Birthday Maths Hub.

Student Activity


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