Number Riddles

It is a square number
It is an odd number
It is < 50 and > 20
7 is a factor

It is > 50 and < 90
It is an even number
It is a multiple of 8
24 is a factor

It is a prime number
It is < 40, with two digits
If you double it and take away 9 you get a square number

It is an even number
It is < 79
5, 4, and 3 are all factors
It is a multiple of 10

It is a square number
It is an odd number
It is < 50 and > 20
4 is a factor

A Mathematics Lesson Starter Of The Day

Topics: Starter | Number | Riddles

  • Jerry McKee, Taradale Intermediate
  • I managed to find a solution for the last riddle
    25, It's odd, it is a square number (5x5), Multiple of 4 (4x6.25).
  • Transum,
  • Pupils often complain when you give them a problem that has no solution or is impossible to solve. Of course the skill is being able to confidently prove this fact. Do you give this type of challenge often enough?

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 a fast-reaction game based on the properties of numbers.

Student Activity


Here is the URL which will take you to the Transum collection of Maths Riddles.

Student Activity

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