
Year 9 Being resourceful
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problem
Special numbers
My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?
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problem
How far does it move?
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects the distance it travels at each stage.
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problem
What does random look like?
Engage in a little mathematical detective work to see if you can spot the fakes.
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problem
Legs eleven
Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?
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problem
1 step 2 step
Liam's house has a staircase with 12 steps. He can go down the steps one at a time or two at time. In how many different ways can Liam go down the 12 steps?
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problem
Square coordinates
A tilted square is a square with no horizontal sides. Can you devise a general instruction for the construction of a square when you are given just one of its sides?
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problem
Two's company
Seven balls are shaken. You win if the two blue balls end up touching. What is the probability of winning?
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problem
Cosy corner
Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?