Test:
Ratio - Challenging
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Question 1:
Find the unknown number
3
8
=
a
24
A
9
B
1
24
C
64
D
1
9
Question 2:
Find
x
if
8
:
x
=
12
:
3
A
2
B
1
2
C
1
D
4
Question 3:
Find the
x
term
1
3
:
5
=
x
:
15
A
1
5
B
1
C
1
3
D
3
Question 4:
Find the
x
term
(
5
x
−
6
)
:
12
=
2
:
3
A
0.28
B
5
14
C
28
D
2.8
Question 5:
Find the
a
term:
1.8
7
−
a
=
0.75
30
A
0.65
B
−
65
C
1
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
22.5
g
B
225
g
C
2.25
g
D
2250
g
Question 7:
Find
x
in the proportion
0.1
x
+
6
3.5
=
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
140
g
B
1400
k
g
C
140
k
g
D
1.4
k
g
Question 9:
Express the number
36
as a ratio of two numbers:
2
and
4
.
A
10
:
26
B
18
:
18
C
12
:
24
D
30
:
6
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
0.6
c
m
C
16
c
m
D
6
c
m
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