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Five Steps to 50
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Five Steps to 50

5 to 7

Use five steps to count forwards or backwards in 1s or 10s to get to 50. What strategies did you use?

Agile Algebra
problem

Agile Algebra

16 to 18

Observe symmetries and engage the power of substitution to solve complicated equations.

Magic Crosses
problem

Magic Crosses

7 to 14

Can you find examples of magic crosses? Can you find all the possibilities?

Tables Without Tens
problem

Tables Without Tens

7 to 11

Investigate and explain the patterns that you see from recording just the units digits of numbers in the times tables.

A New Challenge
article

A New Challenge

5 to 11
In this article for teachers, Bernard gives some background about the theme for November 2011's primary activities, which focus on analysing different approaches.
Easy as \abc
problem

Easy as Abc

14 to 18
Get your teeth into the abc conjecture
Small tomato seedlings in pink pots.
problem

Peter's Primes

14 to 16

Peter wrote a list of all the numbers that can be formed by changing one digit of the number 200. How many of Peter's numbers are prime?

Small tomato seedlings in pink pots.
problem

Triangular Algebra

14 to 16

Weekly Problem 26 - 2017
The angles in the triangle are shown in the diagram in terms of x and y. If x and y are positive integers, what is the value of x+y?

Small tomato seedlings in pink pots.
problem

Marathon Mission

14 to 16

Minnie trained more for the London Marathon this year, so her speed increased. By what percentage did her time decrease?

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