Mixing Lemonade
Age 11 to 14 Challenge Level:
Can you work out which drink has the stronger flavour?
M, M and M
Age 11 to 14 Challenge Level:
If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?
Tilted Squares
Age 11 to 14 Challenge Level:
It's easy to work out the areas of most squares that we meet, but what if they were tilted?
Counting Factors
Age 11 to 14 Challenge Level:
Is there an efficient way to work out how many factors a large number has?
Steel Cables
Age 14 to 16 Challenge Level:
Some students have been working out the number of strands needed for different sizes of cable. Can you make sense of their solutions?
Different by One
Age 14 to 16 Challenge Level:
Can you make lines of Cuisenaire rods that differ by 1?
Standard Index Form Matching
Age 14 to 16 Challenge Level:
Can you match these calculations in Standard Index Form with their answers?
Difference of Two Squares
Age 14 to 16 Challenge Level:
What is special about the difference between squares of numbers adjacent to multiples of three?
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NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.