Patterns: Constant Ratio
A quantity doubles each step. If it starts at 6, what is it after 3 steps?
48
Convert 2.5 m to cm.
250cm
If 1 teaspoon ≈ 5 ml, how many ml in 4 teaspoons?
20 ml
Convert 2 hours 30 minutes to minutes.
150 minutes
Rectangle length 8 m, width 5 m. Perimeter?
26 m
A price increases by 10% from R250. New price?
R275
Convert 5 000 g to kg.
5 kg
If 5 ℓ paint covers 20 m², how many m² will 2 ℓ cover?
8 m²
A call starts at 18:03 and ends at 18:21. Duration?
18 minutes
Same rectangle. Area?
40 m²
A population grows by 5% from 12 000 in one year. New population?
12 600
Convert 36 inches to cm (use 1 inch = 2.54 cm).
91.44 cm
If 750 ml costs R24, what is the cost per 100 ml?
R3.20
Distance is 180 km and time is 2 h 15 min. Average speed (km/h)?
80 km/h
A cube has side 6 cm. Volume?
216 cm³
A value decreases by 15% from 980. New value?
833
Convert 2.8 feet to metres (use 1 foot = 0.3048 m).
0.85344 m
A recipe uses 300 g flour for 12 muffins. How much flour for 30 muffins?
750 g
A trip is 65 km. Time is 57 minutes. Average speed (km/h, 1 decimal)?
68.4 km/h
A rectangular box: length 0.30 m, width 0.20 m, height 0.15 m. Volume (m³)?
0.009 m³
A phone costs R4 800 and loses 12% value per year. Value after 2 years (nearest rand)?
R3 715
Convert 680F to oC using C = (F-32) x 5/9
20oC
A car uses 7.5 ℓ per 100 km. How many litres for 460 km?
34.5 ℓ
A train departs 05:47, travels 2 h 38 min, then stops 17 min, then travels 1 h 12 min. Arrival time?
09:54
A cylindrical tank has radius 0.85 m and height 2.2 m. Using pi=3.142 / π=3.142, calculate the volume in litres (nearest litre).
4 994 ℓ