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"Lower Secondary"
Replace the letters in FOOT + BALL = GAME with numbers to make the sum correct. Each letter represents a different digit.
Here is one example: F=1, O=9, T=4, B=6, A=5, L=3, G=8, M=2, E=7
How many solutions can you find?
There are 224 solutions altogether.
You can work with pencil and […]
This is not an activity to do on your own. The suggested plan is that you take the discussion points one by one, perhaps one a week, and discuss them at school or at home. You might look at https://ourworldindata.org/coronavirus for the latest statistics when you have your discussion.
There is […]
This data from the World Health Organisation portrays the growth in the number of confirmed cases of the coronavirus disease. In some countries the pattern appears to be exponential growth. Data is given for the most affected countries and for the two countries in Africa with more than 10 cases.
In one week, new data […]
Complete the calculations in the first list. Then use your answers to find the numbers to fill the boxes in the second list.
What do you notice about the connections between the equations: ☐ × 8 + 1 = 9 etc. and the calculations: (9 – 1) ÷ 8 […]
ADHK is a square of side length 12 cm
AB = BC= CD = AE
BE is parallel to CF
EI is parallel to FJ
GE is parallel to AD
Can you find the side lengths of the different shapes?
Justify your answers.
The area of JGK is 20 cm².
Can […]
Three quarters of the area of the rectangle has been shaded.
What is the value of x?
Click here to download the USE AREA TO FIND x worksheet.
Click here for the Notes for Teachers.
Which is longer, the dashed portion of the square or the circumference of the circle?
Explain your reasoning.
Click here for Teacher’s Notes
Click here for the poster.
Start by watching the video https://youtu.be/B2dkNPaTmDY
Each student should have a stage 3 Sierpinski triangle of edge length about 6.5 cm and a colouring pen, and should colour their triangle as shown by the black filling in the small diagram.
The class will make poster of a stage […]
1. If the red square has area 1 square unit. What is the area enclosed by the stage 1 squareflake?
2. What is the area enclosed by the stage 2 squareflake? What about the stages 3 and 4 squareflakes?
3. If replacing each line segment on the edge with the zig-zag is […]
The curve, also known as the ‘snowflake curve’, was invented in 1904 by the Swedish mathematician Helge von Koch.
Take a large piece of backing paper, and either draw an equilateral triangle with edges of length 27 cm or cut a triangle from coloured paper and stick it on […]
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