**"Whole numbers"**

## Magic Numbers

*By toni On 6 October, 2021 · Leave a Comment*

What patterns do you see in them?

Suppose you have to share 9872 gold coins between 8 people.

You give the coins out in thousands until there are less than 8000 left.

Then you give out one hundred at a time until there are less than 800, then […]

## Odds and Evens

*By toni On 11 September, 2021 · Leave a Comment*

Do your own experiments using number cards to play the games and pick 2 cards at random each time.

In Game A an envelope or bag contains balls, or cards, numbered 2, 3, 4, 5 and 6. Pick out two balls or cards at random. If the total is even you win. […]

## Money Bags

*By toni On 1 September, 2021 · 2 Comments*

Ram had 15 coins, all the same kind, and he put them into 4 bags.

He labelled each bag with the number of coins inside it.

He could then pay any sum of money from 1 coin to 15 coins using one or more of the bags without opening any of the bags.

How […]

Download the pieces of the puzzle here and cut out the 16 small triangles.

Arrange the 16 pieces into a larger triangle so that the numbers on matching edges are the same, for example .

Click here to download the POWER MATCHING worksheet.

Click here for Notes for […]

## Prime Sieve

*By toni On 7 January, 2021 · Leave a Comment*

You might like to start by investigating the patterns you get when you shade multiples of a number on a grid. Download here

For the prime sieve investigation use a 100 square grid (download here):

Circle the number 2. Put a line through every multiple of 2 up to 100.

[…]

Can you find the chosen number from this square using the clues below?

1. The number is odd.

2. It is a multiple of three.

3. It is smaller than 7 x 4.

4. It has an even tens digit.

5. It is the greater of the two possibilities.

[…]

## The answer is 2021 but what is the question?

*By toni On 29 December, 2020 · Leave a Comment*

It is not easy to find the factors of 2021, but here is a clue: use the fact that $3 \times 7 = 21$

You can be a creative mathematician, you can be someone who has your own mathematical ideas. Find your own interesting facts about 2021 and calculations that have the […]

## One Step Two Steps

*By toni On 17 August, 2020 · Leave a Comment*

A staircase has 12 steps. You can go down the steps one at a time or two at time.

For example:

You could go down 1 step, then 1 step, then 2 steps, then 2, 2, 1, 1, 1, 1 as in the picture.

In how many different ways […]

## Target 10 Thousand

*By toni On 15 May, 2020 · Leave a Comment*

Another TARGET game for any number of players. You want to win? So THINK MATHEMATICALLY and ESTIMATE the likely answers. When you multiply H hundreds by T tens what do you want the product of the digits H×T to be? A bit less than 10 perhaps?

You will need a set of 10 cards […]

## Target 100

*By toni On 15 May, 2020 · Leave a Comment*

A game for any number of players. You want to win by getting the total close to 100, so THINK MATHEMATICALLY! Concentrate on the digits in the tens column. What do you want them to add up to?

You need a set of 10 cards numbered 0 to 9 or a spinner. […]

### South Africa COVID-19 News

Here is the official website for COVID-19 updates.

### Login

### SUPPORT AIMSSEC