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Flashcards in MOCK Deck (15)
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1

How do you work out the LCM (lowest common multiple

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)

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

amount= 1000(1.08)^6
= £1586.87

5

find the upper and lower bounds of 9m

upper bound- 9.5m
lower bound- 8.5m

6

What does A U B mean in venn diagrams

-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

-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

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

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

-order the data from smallest to largest

-minus the largest number from the smallest

14

what is y= -f(x)

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

-x axis = mirror line

15

what is y= f(-x)

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