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SHHS - GCSE Maths > Foundation > Flashcards

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

How many sides does a nonagon have?

9