S2 Ratio, Scale and Proportion

• 5 : 9 : 18.

• 5 : 10 : 18.

• 18 : 9 : 5.

• 18 : 10 : 5.

If a : b = 9 : 5 and a : c = 9 : 10, then a : b : c =

• 9 : 1 : 2.

• 9 : 5 : 10.

• 18 : 5 : 10.

• 81 : 45 : 50.

• 2 : 5 : 30.

• 5 : 2 : 12.

• 12 : 30 : 5.

• 15 : 6 : 1.

• 2 : 1 : 2

• 14 : 21 : 18.

• 14 : 21 : 27.

• 196 : 441 : 324.

The total score of Raymond in three fitness tests is 258 marks. The ratio of his score in the

push-up test to that in the sit-up test is 3 : 4 , while the ratio of his score in the sit-up test to that

in the pull-up test is 5 : 2 . Find the score of Raymond in the pull-up test.

• 12 marks

• 20.64 marks

• 48 marks

• 90 marks

The scale of a map is 10 cm to 500 m. Express the scale in the form of 1 : n.

• 1 : 50

• 1 : 500

• 1 : 5000

• 1 : 50000

The scale of a map is 35 cm : 7 km. Express the scale in the form of 1 : n.

• 1 : 2000

• 1 : 20000

• 1 : 50000

• 1 : 200000

It is given that the scale of a map is 3 cm to 48 km. If the actual length of a flight path is

288 km, what is the length of the path on the map?

• 2 cm

• 2 km

• 18 cm

• 18 km

The distance between an airport and a hotel is 6.5 cm on a map with a scale of 1 : 50 000 . The

actual distance between the airport and the hotel is

• 325 m.

• 1.3 km.

• 3.25 km.

• 13 km.

The length of a highway on a map with a scale of 1: 450 000 is 2.5 cm. Find the length of the

highway on another map with a scale of 2 cm to 2.5 km.

• 1.44 cm

• 9 cm

• 14.4 cm

• 90 cm