Core Mathematics

1Find the simple interest on GH¢1,500 at 8% per annum for 3 years.

2A map scale is 1 : 25,000. A distance of 8 cm on the map represents

3A 20% solution of salt is mixed with a 50% solution to make 60 litres of 30% solution. How many litres of the 20% solution are used?

4A car covers 240 km at 60 km/h and returns at 40 km/h. Its average speed for the whole journey is

5The exchange rate is GH¢15 to US$1. How many dollars is GH¢600?

6A recipe uses flour and sugar in the ratio 5 : 2. How much flour is needed with 300 g of sugar?

7Convert 72 km/h to metres per second.

8GH¢600 is shared in the ratio 2 : 3 : 5. The largest share is

9Increase GH¢40 in the ratio 5 : 4.

10A map has a scale of 1 : 50,000. What real distance does 4 cm on the map represent?