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Arsenal Collection: Stadium Sightline
Reaction Timer
This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.
Count Me In
How do you know whether you will reach these numbers when you count in steps of six from zero?
Birthday Cake Candles
This challenge involves calculating the number of candles needed on birthday cakes. It is an opportunity to explore numbers and discover new things.
Three Squares
What is the greatest number of squares you can make by overlapping three squares?
Happy BirthDay
Can you interpret this algorithm to determine the day on which you were born?
World of Tan 19 - A Circular Problem
Can you fit the tangram pieces into the outline of this teacup?
An Average Average Speed
My average speed for a journey was 50 mph, my return average speed of 70 mph. Why wasn't my average speed for the round trip 60mph ?
Fix Me or Crush Me
Can you make matrices which will fix one lucky vector and crush another to zero?