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"Lower Secondary"
You can be a creative mathematician, you can be someone who has your own mathematical ideas. Find your own interesting facts about the number 2025 and calculations that have the answer 2025.
For example, you might ask: ‘do you find anything interesting if you reverse the digits of 2025 and add the […]
This is a game for 2 players. You need a pack of 52 playing cards. Shuffle the cards. One player is dealer and turns the cards face up one at a time. Before seeing the card, the other player must say ‘red’ or ‘black’ and wins […]
This square is one unit and it is split into smaller parts. Label each part with the fraction it shows.
How many green rectangles make one unit?
How many small red squares make one unit?
How many small blue rectangles make one unit?
How many small pink rectangles make one unit?
Which […]
The aim of the game is to make a number as close to half a million as possible. Which of the numbers in the table is closest to half a million?
This game uses ten cards numbered 0, 1, … 9. The cards are put face down and mixed up.
Each player […]
Watch the video about the Metre Cube and Scale.
How many children can fit inside a metre cube (1 metre by 1 metre by 1 metre)? How many adults?
How many cubic centimetres (1 centimetre by 1 centimetre by 1 centimetre) can fit inside a metre cube?
[…]
The probability that there are two people in a group with birthdays in the same month depends on the size of the group.
What if the group has more than twelve people?
What about a group of 2 people? What is the probability they have birthdays in different months?
Both 9 and 10 can be made up in 2 different ways by adding pairs of the numbers 1, 2, … 6, that is
9 = 3 + 6 = 4 + 5
10 = 4 + 6 = 5 + 5
Explain why it is that when you throw two dice you are more […]
There are many investigations and projects you could do based on the Sierpinski Tetrahedron.
For a start: how many small tetrahedra, like the blue model shown, were used to make the 6.5 metre high red balloon model shown below.
The smallest tetrahedron (Stage 0), the blue model, is made from 6 balloons, each […]
If Busi has 3 children what is the probability that at least one will be a girl?
Imagine tossing a coin three times.
What’s the probability you will get a head on at least one of the tosses?
Suppose you drew this tree diagram. How would it help you to find the answers to […]
The histogram shows the number of children in each age group on a school bus. There are no children under 5 years and no children over 17 years. There are 6 children aged between 5 and 10 years . Explain why the class boundaries are 5, 11, 16 and 18. Complete the following table. […]
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