Ratio - Challenging

Question 1: Find the unknown number

\frac{3}{8} = \frac{a}{24}

A

\frac{1}{9}

B

64

C

\frac{1}{24}

D

9

Question 2: Find

x

if

8 : x = 12 : 3

A

4

B

1

C

2

D

\frac{1}{2}

Question 3: Find the

x

term

\frac{1}{3} : 5 = x : 15

A

\frac{1}{3}

B

1

C

3

D

\frac{1}{5}

Question 4: Find the

x

term

(5 x - 6) : 12 = 2 : 3

A

2.8

B

\frac{5}{14}

C

28

D

0.28

Question 5: Find the

a

term:

\frac{1.8}{7 - a} = \frac{0.75}{30}

A

- 65

B

65

C

0.65

D

\frac{1}{65}

Question 6: There are

50

grams of salt in

2

liters of a solution. How much salt is in

9

liters of such solution?

A

2.25 g

B

22.5 g

C

225 g

D

2250 g

Question 7: Find

x

in the proportion

\frac{0.1 x + 6}{3.5} = \frac{4}{5}

A

- 3.2

B

32

C

- 32

D

3.2

Question 8:

12 %

of sugar is extracted from a sugar beet. How much beet is required to extract

16.8

kilograms of sugar?

A

140 k g

B

1.4 k g

C

1400 k g

D

140 g

Question 9: Express the number

36

as a ratio of two numbers:

2

and

4

.

A

30 : 6

B

10 : 26

C

12 : 24

D

18 : 18

Question 10: A distance between two cities is

120

km. What is the distance between two cities on a map with a scale

1 : 2000000

?

A

6 c m

B

0.6 c m

C

16 c m

D

60 c m

Test: Ratio - Challenging

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