Flashcards in Foundation Deck (181)

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1

## What are the multiples of 20?

### 20, 40, 60, 80, 100, 120 …

2

## What are the factors of 20?

### 1, 2, 4, 5, 10, 20

3

## How do you find 50% of a number?

### ÷ 2

4

## How do you find 25% of a number?

### ÷ 4 (or half it and half again)

5

## How do you find 10% of a number?

### ÷ 10

6

## How do you find 1% of a number?

### ÷ 100

7

## How do you find 5% of a number?

### Find 10% then half it

8

## How do you find 20% of a number?

### Find 10% then double it

9

## How do you find 75% of a number?

### Add 50% and 25%

10

## How do you 'square' a number?

### Multiply it by itself. e.g. 5² = 5 x 5 = 25

11

## How do you 'cube' a number?

### Multiply it by itself and by itself again. e.g. 2³ = 2 x 2 x 2 = 8

12

## What is the sum of the angles in a triangle?

### 180°

13

## What is the sum of the angles in a quadrilateral?

### 360°

14

## What is the sum of the angles in a pentagon?

### 540°

15

## What is the sum of the angles in a hexagon?

### 720°

16

## How do you find the area of a triangle?

### ½base times height

17

## How do you find the area of a rectangle?

### Length times width

18

## How do you find the circumference of a circle?

### Pi x diameter (or 2?r)

19

## How do you find the area of a circle?

### Pi x r² (?r²)

20

## How do you find a fraction of an amount? (e.g. ¾ of 20?)

### Divide by the bottom times by the top. (e.g. 20 ÷ 4 = 5, 5 x 3 = 15)

21

## What does a cylinder look like?

### tin of soup, can of pop…

22

## What does a cone look like?

### traffic cone, ice cream cone

23

## What does a sphere look like?

### ball

24

## What does a parallelogram look like?

### pushed over rectrangle

25

## How many sides does a pentagon have?

### 5

26

## How many sides does an octagon have?

### 8

27

## How many sides does a hexagon have?

### 6

28

## How many sides does a decagon have?

### 10

29

## How many sides does a heptagon have?

### 7

30