Ratio - Challenging

Question 1: Find the unknown number

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

A

\frac{1}{9}

B

\frac{1}{24}

C

9

D

64

Question 2: Find

x

if

8 : x = 12 : 3

A

2

B

\frac{1}{2}

C

4

D

1

Question 3: Find the

x

term

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

A

1

B

\frac{1}{5}

C

\frac{1}{3}

D

3

Question 4: Find the

x

term

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

A

0.28

B

\frac{5}{14}

C

2.8

D

28

Question 5: Find the

a

term:

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

A

- 65

B

\frac{1}{65}

C

0.65

D

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

225 g

B

2250 g

C

22.5 g

D

2.25 g

Question 7: Find

x

in the proportion

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

A

- 32

B

32

C

- 3.2

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

1.4 k g

B

140 g

C

1400 k g

D

140 k g

Question 9: Express the number

36

as a ratio of two numbers:

2

and

4

.

A

12 : 24

B

30 : 6

C

10 : 26

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

60 c m

B

6 c m

C

0.6 c m

D

16 c m

Test: Ratio - Challenging

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