Flashcards in MOCK Deck (15)

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1

## How do you work out the LCM (lowest common multiple

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e.g. LCM of 12 and 15

12 15

24 30

36 45

48 60

60

LCM = 60

2

## How do you work out the HCF (highest common factor)

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1) list factors that appear in both numbers

2) multiply together

e.g. HCF of 180 and 84

180= 2x2x3x3x5

84= 2x2x3x7

HCF= 2x2x3=12

3

## What is the formula for compound interest

### n= n0(1+r/100)n

4

##
How do you use the compound interest formula in this question:

-a man invests £1000 in a savings account which pays 8% compound interest per annum. How much will there be after 6 years

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amount= 1000(1.08)^6

= £1586.87

5

## find the upper and lower bounds of 9m

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upper bound- 9.5m

lower bound- 8.5m

6

## What does A U B mean in venn diagrams

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-UNION: means a set that contains all the members in set A and B

e.g. F=2,5,6

G= 1,5,7

members of F U G= 1,2,5,6,7

7

## What does A n B mean in venn diagrams

### -INTERSECTION: a set that contains numbers that are members of both sets

8

## What does n(A) mean in venn diagrams

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-means the number of members in a set

e.g. members of L= 4,5,6,7

find n(L)- 4

9

## what does A' mean in venn diagrams

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everything not in A

-e.g. members in whole venn diagram: 1,2,3,4,5,6,7,8,9,1-

members in F= 3,6,9

members in F'= 1,2,4,5,7,8,10

10

## What is the formula for speed, distance, time

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Distance

Speed x Time

11

## what is the mean

### add up all the numbers and divide by how many there are

12

## what is the mode

### most frequent number

13

## what is the range

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-order the data from smallest to largest

-minus the largest number from the smallest

14

## what is y= -f(x)

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y= -f(x) is a reflection of y= f(x) in x-axis

-x axis = mirror line

15