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9MAT > 9MAT recall practice > Flashcards

9MAT recall practice Flashcards

1
Q

Calculate 2 + 3 x 4

A

14

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2
Q

Calculate 12 - (5+1) x 2

A

0

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3
Q

What is the definition of an improper fraction?

A

Improper fractions are fractions where the numerator is greater than the denominator

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4
Q

Convert 4 and 3/7 to an improper fraction

A

31/7

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5
Q

What is 3/8 of 16?

A

6

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6
Q

5/11 of ? is 30

A

? is 66

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7
Q

Give the first 4 multiples of 6.

A

6, 12, 18, 24

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8
Q

What is the lowest common multiple (LCM) of 3 and 5?

A

15

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9
Q

What are the factors of 24?

A

1, 24 2, 12 3, 8 4, 6

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10
Q

What is the highest common factor (HCF) of 24 and 40?

A

8

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11
Q

What is the definition of prime numbers?

A

A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers.

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12
Q

Is 1 a prime number?

A

No

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13
Q

What are the Prime Factors of 50?

A

2 x 5 x 5

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14
Q

What is the Cube Root of 64?

A

4

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15
Q

What does BEDMAS stand for?

A

Order of operations. Brackets, Exponential, Division, Multiplication, Addition, and Subtraction. We always solve the equation from left to right if order of operation is the same.

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16
Q

Round 3065.192 to 1 dp.

A

3065.2

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17
Q

Round 3065.192 to 2 dp.

A

3065.19

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18
Q

Which is larger 1/3 or 2/5?

A

2/5

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19
Q

Amy put 2 kg of sweets in 12 bags. What is the weight of sweets in each bag?

A

1/6 kg

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20
Q

What is 1/3 + 2/5?

A

11/15

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21
Q

What is 1/3 x 2/5?

A

2/15

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22
Q

What is 3/4 divided by 3/2?

A

1/2

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23
Q

Write down the expanded form of 4!

A

4x3x2x1

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24
Q

Calculate 6!

A

720

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25
Q

Calculate sqrt(400) / sqrt(25)

A

4

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26
Q

Find the general formula of the sequence: 3, 8, 13, 18, 23 ……

A

5n-2

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27
Q

Find the general formula of the sequence: 10, 7, 4, 1, -2 ……

A

-3n+13

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28
Q

Solve x + 6 = 15

A

x = 11

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29
Q

Solve x - 19 = -43

A

x = -24

30
Q

Solve -4x = 38

A

x = -19/2

31
Q

Solve x/4 = 15

A

x = 15*4 = 60

32
Q

Solve 32/x = 10

A

Step 1: 10x = 32
Step2: x = 32/10 = 3.2

33
Q

Solve 2x+7=29

A

Step 1: 2x = 22
Step 2: x = 11

34
Q

Solve 15 - 8x = 135

A

Step 1: -8x = 120
Step 2: x = 120/-8 = -15

35
Q

Express the sum of x and 4

A

x + 4

36
Q

Express the difference between a number and 3

A

3 - n

37
Q

Express four times a number plus 2

A

4n + 2

38
Q

Express: add three to a number and then multiply it by four

A

4(n+3)
You must include the bracket!!!

39
Q

Express: Triple a number then half your result

A

(3n) / 2

40
Q

Evaluate (a-2)^2 when a = -6

A

64

41
Q

Evaluate a - 5b when a = 7 and b = -3

A

22

42
Q

Simplify 8x + 12x - 3

A

20x - 3

43
Q

Simplify 3x - 6y + 4x + 2y

A

7x -4y

44
Q

Simplify a * a * b * b * b

A

a^2 * b^3

45
Q

Simplify (5xy)/(10y)

A

x/2

46
Q

Simplify 24g^2 / 3g^4

A

8/g^2

47
Q

Simplify 2ab * 4a^2b

A

8(a^3)(b^2)

48
Q

Convert 1.45m to cm

A

145cm

49
Q

Convert 25 cm^2 to mm^2

A

2500mm^2

50
Q

Convert 5.4m^3 to L

A

5400L

51
Q

A workbook weighs 1.8kg. How much would a pallet of 1200 books weigh in tonnes?

A

2.16T

52
Q

A room has dimension 450cm by 320cm. What is its area in m^2?

A

14.4m^2

53
Q

A swimming pool is twice as long as its wide. If its length is 50m, what is its perimeter?

A

150m

54
Q

What is the formula of the perimeter of a circle?

A

C = 2 * pi * r or pi * d

55
Q

What is the formula of the area of a circle?

A

A = pi * r^2

56
Q

A circular pool has a radius of 3.4m. What is the circumference of the pool? (1dp)

A

21.4 m

57
Q

A circular garden has diameter of 8.5m. What is the area of the garden? (whole number)

A

57m^2

58
Q

A semi-circle has radius 1.6cm. What is the perimeter of the semi-circle? (2dp)

A

13.25cm

59
Q

How to calculate the area of a triangle?

A

A = 1/2 * base * height

60
Q

How to calculate the area of a trapezium?

A

A = 1/2 * (a+b) * h

61
Q

What is the sum of the exterior angles of a polygon?

A

360

62
Q

What is the formula for the sum of the interior angles of a polygon?

A

(n-2)*180

63
Q

Angles on a straight line sum to ?

A

180

64
Q

Angles around a point sum to ?

A

360

65
Q

What is the equation of a straight line in general?

A

y = mx + c

66
Q

For the straight line equation y = mx + c, what is m and what is c ?

A

m : gradient
c: y-intercept

67
Q

How to calculate the gradient of a line?

A

m = (y2-y1)/(x2-x1)

68
Q

A straight line passes through (0,3) and (-2, 9). What is the gradient of the line?

A
69
Q

A straight line passes through (0,3) and (-2, 9). What is the equation of the line?

A

y = -3x - 3

70
Q

At the beginning of the season an athlete’s best time for 400m is 65 sec. Over the season he improves his time by 4%. By how much has he improved his time? And what is his time for 400m at the end of the season?

A

Increased by: 65 * 4% = 2.6 secs

Total time is 65 - 2.6 = 62.4 secs

9MAT (1 decks)

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