Test: Ratio - Challenging

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Question 1:   Find the unknown number 3 8 = a 24
9
64
1 9
1 24
Question 2:   Find x if 8:x=12:3
2
4
1 2
1
Question 3:   Find the x term 1 3 :5=x:15
1
1 3
3
1 5
Question 4:   Find the x term ( 5x6 ):12=2:3
28
0.28
2.8
5 14
Question 5:   Find the a term: 1.8 7a = 0.75 30
1 65
65
0.65
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?
2250g
22.5g
225g
2.25g
Question 7:   Find x in the proportion 0.1x+6 3.5 = 4 5
3.2
3.2
32
32
Question 8:   12% of sugar is extracted from a sugar beet. How much beet is required to extract 16.8 kilograms of sugar?
140kg
1.4kg
1400kg
140g
Question 9:   Express the number 36 as a ratio of two numbers: 2 and 4 .
30:6
18:18
10:26
12:24
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 ?
60cm
6cm
16cm
0.6cm