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Grade 7 > Maths > Flashcards

Maths Flashcards

1
Q

Circumference of circle

A

2 πr

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2
Q

Area of a circle

A

πr.sq

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3
Q

Area of a square

A

L.sq

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4
Q

Perimeter of a square

A

4L

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5
Q

Perimeter of a rectangle

A

2L + 2b or 2(L+b)

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6
Q

Area of a triangle

A

(h x base)/2

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7
Q

Perimeter of a triangle

A

a+b+c

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8
Q

∈

A

Belongs to

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9
Q

N

A

Natural numbers

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10
Q

W

A

Whole numbers

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11
Q

Z

A

Integers

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12
Q

⊂

A

Proper subset

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13
Q

⊆

A

Subset (proper or improper we don’t know)

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14
Q

⊄

A

Not a subset

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15
Q

Equal set definition

A

They have the same elements

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16
Q

Equivalent sets

A

They have the same number of element

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17
Q

Formula for the number of subsets

A

2^n when n is the number of elements of the set

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18
Q

Square root of 121

A

11

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19
Q

Square root of 144

A

12

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20
Q

Square root of 169

A

13

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21
Q

Square root of 225

A

15

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22
Q

Square root of 289

A

17

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23
Q

Square root of 361

A

19

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24
Q

Square root of 529

A

23

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25
Q

Square root of 841

A

29

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26
Q

Cube root of 8

A

2

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27
Q

Cube root of 27

A

3

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28
Q

Cube root of 64

A

4

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29
Q

Cube root of 125

A

5

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30
Q

What is called the product of two identical numbers

A

A perfect square

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31
Q

Terminating decimal definition

A

Have a finit number of digits after the decimal
Example : 0.2, 1.56, 30.8

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32
Q

Non-terminating decimal definition

A

Have a infinite number of digits after the decimal

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33
Q

HCF definition

A

The Highest Common Factor is the largest factor of the given numbers.

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34
Q

LCM definition

A

Lowest Common Multiple is the smallest number that is a multiple of both given numbers

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35
Q

Sum means

A

Addition

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36
Q

Difference means

A

Subtract

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37
Q

Subtract a from b means

A

b - a

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38
Q

Product means

A

Multiplication

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39
Q

Times means

A

Multiplication

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40
Q

Quotient means

A

Divide

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41
Q

In a pure repeated/recurring decimal, when does the period starts ?

A

just after the coma

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42
Q

In a mixed repeated/recurring decimal, when does the period starts ?

A

There are one or more digit before the period starts

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43
Q

Diameter is … the radius

A

2 times

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44
Q

The radius is… the diameter

A

Half

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45
Q

1/2 as a percentage

A

50%

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46
Q

1/4 as a percentage

A

25%

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47
Q

3/4 as a percentage

A

75%

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48
Q

1/10 as a percentage

A

10%

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49
Q

3/10 as a percentage

A

30%

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50
Q

7/10 as a percentage

A

70%

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51
Q

1/2 of 6

A

3

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52
Q

1/2 of 8

A

4

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53
Q

1/2 of 18

A

9

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54
Q

1/3 of 6

A

2

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55
Q

2/3 of 6

A

4

56
Q

1/6 of 12

A

2

57
Q

1/3 of 12

A

4

58
Q

2/3 of 12

A

8

59
Q

5/6 of 12

A

10

60
Q

1/2 of 24

A

12

61
Q

1/3 of 24

A

8

62
Q

2/3 of 24

A

16

63
Q

1/6 of 24

A

3

64
Q

1/3 of 27

A

9

65
Q

2/3 of 27

A

18

66
Q

1/9 of 27

A

3

67
Q

2/9 of 27

A

6

68
Q

4/9 of 27

A

12

69
Q

1/2 of 100

A

50

70
Q

50% of 24

A

12

71
Q

50% of 200

A

100

72
Q

50% of 1000

A

500

73
Q

1/2 of 60

A

30

74
Q

1/4 of 60

A

15

75
Q

3/4 of 60

A

45

76
Q

1/6 of 60

A

10

77
Q

1/3 of 60

A

20

78
Q

2/3 of 60

A

40

79
Q

50% of 80

A

40

80
Q

25% of 80

A

20

81
Q

75% of 80

A

60

82
Q

3/8 of 80

A

30

83
Q

1/2 of x is 4

A

X = 8

84
Q

1/2 of x is 3

A

x = 6

85
Q

1/2 of x is 5

A

x = 10

86
Q

1/3 of x is 10

A

x = 30

87
Q

1/3 of x is 2

A

X = 6

88
Q

2/3 of x is 6

A

x = 9

89
Q

1/4 of x is 2

A

X = 8

90
Q

3/4 of x is 12

A

X = 16

91
Q

1/6 of x is 2

A

X = 12

92
Q

1/7 of x is 3

A

X = 21

93
Q

1/10 of 300 is

A

30

94
Q

2/10 of 400 is

A

80

95
Q

1/12 of 24 is

A

2

96
Q

70% of 200 is

A

140

97
Q

What is 2 for 6 ?

A

1/3

98
Q

What is 4 for 6 ?

A

2/3

99
Q

What is 4 for 8 ?

A

1/2 or 50%

100
Q

What is 2 for 8 ?

A

1/4 of 25%

101
Q

What is 6 for 8 ?

A

3/4 or 75%

102
Q

What is 8 for 16 ?

A

1/2 or 50%

103
Q

What is 4 for 16?

A

1/4 or 25%

104
Q

What is 3 for 6 ?

A

1/2 or 50%

105
Q

What is 2 for 6 ?

A

1/3

106
Q

What is 4 for 6?

A

2/3

107
Q

What is 2 for 10

A

1/5

108
Q

What is 10 for 20

A

1/2 or 50%

109
Q

What 5 for 20

A

1/4 or 25%

110
Q

What is 15 for 20

A

3/4 or 75%

111
Q

What is 10 for 50 ?

A

1/5

112
Q

What is 20 for 50 ?

A

2/5

113
Q

What is 30 for 50?

A

3/5

114
Q

What is 25 for 50 ?

A

1/2 of 50%

115
Q

What is 45 for 50

A

90%

116
Q

What is 6 for 9?

A

2/3

117
Q

What is 20 for 60?

A

1/3

118
Q

What is 160 for 200 ?

A

80%

119
Q

What is 80 for 200?

A

40%

120
Q

What is 150 for 300 ?

A

1/2 or 50%

121
Q

What is 70 for 140?

A

1/2 or 50%

122
Q

What is 35 for 140 ?

A

1/4 or 25%

123
Q

2A=B
C=1/2 of A
If A = 10, what are the values of B and C ?

A

B=20
C=5

124
Q

A=1/3 of B
B=2C
If C=6, find the value of A and B

A

B=12
A=4

125
Q

Straight angle

A

80 degrees

126
Q

Right angle

A

90 degrees

127
Q

Complete turn

A

360 degrees

128
Q

Sum of angles of a triangle

A

180 degrees

129
Q

Sum of angles of a quadrilateral

A

360 degrees

130
Q

Supplementary angles

A

180degrees

131
Q

Complementary angles

A

90 degrees

132
Q

Vertically opposite angles

A

Are equal to each others

133
Q

Properties of a parallelogram

A
134
Q

Properties of Rhombus

A
135
Q

Properties of rectangle

A
136
Q

Properties of square

A
137
Q

Consecutive angles or adjacent angles means…

A

Angles next to each others

Grade 7 (2 decks)

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