Maths Flashcards
1
Q
Circumference of circle
A
2 πr
2
Q
Area of a circle
A
πr.sq
3
Q
Area of a square
A
L.sq
4
Q
Perimeter of a square
A
4L
5
Q
Perimeter of a rectangle
A
2L + 2b or 2(L+b)
6
Q
Area of a triangle
A
(h x base)/2
7
Q
Perimeter of a triangle
A
a+b+c
8
Q
∈
A
Belongs to
9
Q
N
A
Natural numbers
10
Q
W
A
Whole numbers
11
Q
Z
A
Integers
12
Q
⊂
A
Proper subset
13
Q
⊆
A
Subset (proper or improper we don’t know)
14
Q
⊄
A
Not a subset
15
Q
Equal set definition
A
They have the same elements
16
Q
Equivalent sets
A
They have the same number of element
17
Q
Formula for the number of subsets
A
2^n when n is the number of elements of the set
18
Q
Square root of 121
A
11
19
Q
Square root of 144
A
12
20
Q
Square root of 169
A
13
21
Q
Square root of 225
A
15
22
Q
Square root of 289
A
17
23
Q
Square root of 361
A
19
24
Q
Square root of 529
A
23
25
Square root of 841
29
26
Cube root of 8
2
27
Cube root of 27
3
28
Cube root of 64
4
29
Cube root of 125
5
30
What is called the product of two identical numbers
A perfect square
31
Terminating decimal definition
Have a finit number of digits after the decimal
Example : 0.2, 1.56, 30.8
32
Non-terminating decimal definition
Have a infinite number of digits after the decimal
33
HCF definition
The Highest Common Factor is the largest factor of the given numbers.
34
LCM definition
Lowest Common Multiple is the smallest number that is a multiple of both given numbers
35
Sum means
Addition
36
Difference means
Subtract
37
Subtract a from b means
b - a
38
Product means
Multiplication
39
Times means
Multiplication
40
Quotient means
Divide
41
In a pure repeated/recurring decimal, when does the period starts ?
just after the coma
42
In a mixed repeated/recurring decimal, when does the period starts ?
There are one or more digit before the period starts
43
Diameter is … the radius
2 times
44
The radius is… the diameter
Half
45
1/2 as a percentage
50%
46
1/4 as a percentage
25%
47
3/4 as a percentage
75%
48
1/10 as a percentage
10%
49
3/10 as a percentage
30%
50
7/10 as a percentage
70%
51
1/2 of 6
3
52
1/2 of 8
4
53
1/2 of 18
9
54
1/3 of 6
2
55
2/3 of 6
4
56
1/6 of 12
2
57
1/3 of 12
4
58
2/3 of 12
8
59
5/6 of 12
10
60
1/2 of 24
12
61
1/3 of 24
8
62
2/3 of 24
16
63
1/6 of 24
3
64
1/3 of 27
9
65
2/3 of 27
18
66
1/9 of 27
3
67
2/9 of 27
6
68
4/9 of 27
12
69
1/2 of 100
50
70
50% of 24
12
71
50% of 200
100
72
50% of 1000
500
73
1/2 of 60
30
74
1/4 of 60
15
75
3/4 of 60
45
76
1/6 of 60
10
77
1/3 of 60
20
78
2/3 of 60
40
79
50% of 80
40
80
25% of 80
20
81
75% of 80
60
82
3/8 of 80
30
83
1/2 of x is 4
X = 8
84
1/2 of x is 3
x = 6
85
1/2 of x is 5
x = 10
86
1/3 of x is 10
x = 30
87
1/3 of x is 2
X = 6
88
2/3 of x is 6
x = 9
89
1/4 of x is 2
X = 8
90
3/4 of x is 12
X = 16
91
1/6 of x is 2
X = 12
92
1/7 of x is 3
X = 21
93
1/10 of 300 is
30
94
2/10 of 400 is
80
95
1/12 of 24 is
2
96
70% of 200 is
140
97
What is 2 for 6 ?
1/3
98
What is 4 for 6 ?
2/3
99
What is 4 for 8 ?
1/2 or 50%
100
What is 2 for 8 ?
1/4 of 25%
101
What is 6 for 8 ?
3/4 or 75%
102
What is 8 for 16 ?
1/2 or 50%
103
What is 4 for 16?
1/4 or 25%
104
What is 3 for 6 ?
1/2 or 50%
105
What is 2 for 6 ?
1/3
106
What is 4 for 6?
2/3
107
What is 2 for 10
1/5
108
What is 10 for 20
1/2 or 50%
109
What 5 for 20
1/4 or 25%
110
What is 15 for 20
3/4 or 75%
111
What is 10 for 50 ?
1/5
112
What is 20 for 50 ?
2/5
113
What is 30 for 50?
3/5
114
What is 25 for 50 ?
1/2 of 50%
115
What is 45 for 50
90%
116
What is 6 for 9?
2/3
117
What is 20 for 60?
1/3
118
What is 160 for 200 ?
80%
119
What is 80 for 200?
40%
120
What is 150 for 300 ?
1/2 or 50%
121
What is 70 for 140?
1/2 or 50%
122
What is 35 for 140 ?
1/4 or 25%
123
2A=B
C=1/2 of A
If A = 10, what are the values of B and C ?
B=20
C=5
124
A=1/3 of B
B=2C
If C=6, find the value of A and B
B=12
A=4
125
Straight angle
80 degrees
126
Right angle
90 degrees
127
Complete turn
360 degrees
128
Sum of angles of a triangle
180 degrees
129
Sum of angles of a quadrilateral
360 degrees
130
Supplementary angles
180degrees
131
Complementary angles
90 degrees
132
Vertically opposite angles
Are equal to each others
133
Properties of a parallelogram
134
Properties of Rhombus
135
Properties of rectangle
136
Properties of square
137
Consecutive angles or adjacent angles means…
Angles next to each others
