Grade 9 Mathematics Revision Quiz

Set by 9W, 9R, 9E & 9G 2009

MENTAL MATHEMATICS

No calculators allowed:1. 50 X 50

2.

3.

4.

5.

6. (Leave your answer as a fraction)

100 40 – 10 2 64

010

5

3

2

2

2825

WORD SUMS

1. Jimmy has 7 times more CDs than Sarah.

Sarah has 54. How many CDs does Jimmy have?

2. Jack is 10 years older than Jill.

Jill is 5 years younger than Andrew.

Andrew is 45 yrs old.

How old will Jack be in 4 years time?

WORD SUMS

3. Distance from Cape Town to Montagu is 200km. If I traveled for 2 hours to get there, what was my speed?

4. A 100 cm piece of wire is cut into 2 equal pieces, one a circle and the other a square around the circle. Find the length of the square.

WORD SUMS

5. There are 140 stars. 16 of them are black and 98 of them are white. What fraction of the stars are left over? (Simplify your answer)

6. Tom eats 12 chocolates per year. Gary eats double the amount that Tom eats. Pete eats three quarters of the amount of Tom and Gary combined. How many chocolates does Tom eat per year?

WORD SUMS

7. Susan walks to school. She walks at a speed of 7km/h and it takes her 20 minutes. How many kilometres does she live from school.

8. Mr Knight is six times as old as his son, Marcus. If Marcus’ present age is x, write down in terms of x, the age Mr Knight will be in 12 years time.

PATTERNS

1. Find the next 5 numbers in the sequence.

1, 1, 2, 3, 5, 8

2. What is the name of this sequence?

ALGEBRA

Find the following products

1.

2.

3.

2(3 5)x

( 2)( 2)x x

2 3 212( )a b

ALGEBRA

Simplify:

4. 4(x + y) -3(y - x)

5. 2p- 5p + 7 – (-2p - 8p) – (5 – 2p - 3p)

FRACTIONS

Simplify

1. 3.

2. 4.

ba

ba

22

31

2

6

18

bca

abc

22

53

3

6

yx

yx

x

xx

5

105 2

EXPONENTS

Evaluate or simplify:

1. -2-3

2. (2a2b3)2

3. 3a(ab)4 6a3b

FACTORISING

Factorise fully

1.

2.

3.

4.

2 2 3 224 36 30ap b p abp

)1()1(2 xxx2 2 264x y z14 x

SCIENTIFIC NOTATION

1. Write in scientific notation:

0,00001269

2. Expand

53,5 10

GEOMETRY

Find the perimeters of the shapes below (To one decimal place if necessary)

5 cm

25 mm

5 cm

6 cm

1 2

GEOMETRY

3. What is the area of

the “half doughnut”?

GEOMETRY

4. What is the circumference (of the curved part of) three quarters of a circle if the diameter is 12mm?

5. What is the volume (in cm3) of a

box with a capacity of 12l?

GEOMETRY

6. What is the height of a cylinder if the volume is 600 litres and the radius is 50cm?

50 cm

Height

EQUATIONS

Solve for a

1. 2a + 15 = 27

2. 2(2a + 3) = -38

3. 3(a – 6) – (2a – 1) = -7

RATIOS

1. Decrease 216 by the ratio 3:2

2. Convert 53 out of 80 marks to a %

3. Simplify the ratio 1392 : 29

4. If 300 g of oats cost R13,80 and 400g oats cost R19,00, what is the better buy?

MULTIPLE CHOICE

1. The distance between two towns is given in two ways on a certain map: m miles or k kilometers. If 5 miles is the same distance as 8 kilometers; which of the following is true?

A 5m = 8k B 8m = 5k C mk = 40

D m + k = 13 E mk = 8/5

MULTIPLE CHOICE2.When the diagram

shown is folded to make a cube, the face marked U is opposite the face marked …

A) P B) QC) R D) SE) T

MULTIPLE CHOICE

3. Which of the numbers is the smallest?

A) 4.11172 B) 4.1 C) 4.11

D) 4.117 E) 4.112

4. The value of 1,1 x 10 is

A)1 B)11 C)1,1

D)11,1 E)110

CRITICAL THINKING

1. The day before the day before yesterday is three days after Tuesday.

What day is it today?

2. How many different triangles can be made with seven matches so that the perimeter of each triangle is the total length of the seven matches?