8/14/2019 Check Progress ( Unit 1)

1/2

These exercises are taken from:

Mathematics: IGCSE (Cambridge International Examinations)(Paperback)

by Karen Morrison(Author)

1) 8, 10, 12, 14, 15, 21, 23From the list of numbers above, write down:a) a prime number b) a multiple of 6 c) a factor of 36

2) What is the next number in each of the following sequences:a) 25, 36, 49,. B) 1, 8, 27, .?

3) One day the temperature on Mount Everest changed from Co28 to Co29 in a

few hours. By how many degrees did the temperature change?4) Work out:

a) ( ) 7232817 + . b)

+8

1

4

1

6

5

5) 3.1,25,,2502

12 , 27

Which of the numbers above is:a) irrational b) square c) prime

6) 3 800 students took an examination19% received Grade A24% received Grade B31% received Grade C10% received Grade D11% received Grade E

The rest received Grade Ua) What percentage of the students received Grade U?b) What fraction of the students received Grade B?c) How many students received Grade A?

7) Maria changed $80 into Argentinean pesos when the exchange rate was $1 to15.43 pesos. A week later, the exchange rate was $1 to 15.52 pesos.How many more pesos would Maria have received if she had waited a weekbefore changing her dollars?

8) Ahmad bought compact disc for $15. He sold it to Barbara, making a 20% loss.a) How much did Barbara pay for it?b) Barbara later sold the disc to Luvuyo. She made a 20% profit.

How much did Luvuyo pay for it?9) In 1988 there were 27 500 cases of Salmonella poisoning in Britain. In 1989 there

was an increase of 9% in the number of cases. Calculate how many cases therewere in 1989.

10) Last year, Janes wages were $80 per week. Her wages are now $86 per week.Calculate the percentage increase.

11) Abduls height was 160cm on his 15th birthday. It was 172cm on his 16 th birthday.What was the percentage increase in his height?

http://www.amazon.co.uk/exec/obidos/search-handle-url?_encoding=UTF8&search-type=ss&index=books-uk&field-author=Karen%20Morrisonhttp://www.amazon.co.uk/exec/obidos/search-handle-url?_encoding=UTF8&search-type=ss&index=books-uk&field-author=Karen%20Morrisonhttp://www.amazon.co.uk/exec/obidos/search-handle-url?_encoding=UTF8&search-type=ss&index=books-uk&field-author=Karen%20Morrison

8/14/2019 Check Progress ( Unit 1)

2/2

12) What is the simple interest on $160 at2

17 % per year for 3 years?

13) Senor Vasquez invests $500 in a Government Bond, at 9% simple interest peryear. Hoe much will the Bond be worth after 3 years?

14) Klaus and Heidi plan a holiday in the USA in August.

a) Klaus decides to change 800 Euros into dollars in January when theexchange rate is $1 = 1.68. A bank charge of 1% is then deducted.Calculate how much he receives, to the nearest dollar.

b) (i) Heidi invests her 800 in a bank at an annual rate of 9% simple interest.Calculate the amount she has after 6 months.(ii) She now changes this amount into dollars. The exchange rate is

$1= 1. 87, but this time there is no bank charge. Calculate how muchHeidi receives, to the nearest dollar.

c) Who made the better decision?d) They bring a total of $120 back with them and exchange it at a rate of

$1 =1.72 with no bank charge. Calculate how much they received, to the

nearest Euro.