         Mathematics in Practical Situation
Mathematics in Practical Situations
Practice 1
1.
Mr. Tan is going to Penang, Malaysia and wants to change S\$400 into Malaysian ringgit.
Based on the exchange rates quoted in Table below, find the amount he will receive in
Ringgit.
 Foreign currency Selling S\$100 for Buying S\$100 for Malysian Ringgit (RM) 226.50 223.50

2.
James exchanged €2000 one week before his trip to France when the exchange rate
between the Euro and the Singapore dollar was €1.00 to S\$2.00.
(a) Find the amount, in Singapore dollars, that James used to exchange for the Euro.
(b) The exchange rate between the Euro and the Singapore dollars two weeks before
James' trip to France was €1.00 to S\$1.95. If James had exchanged the Euro back then,

how much could he have saved?

3.
Find the simple interest in each of the following cases.
(a) \$1500 for 4 years at 2.5% per annum.
(b) \$6000 for 5 years at 5% p.a.
(c) \$2000 for 5 months at 3% p.a.

4.
Find the principal that will earn a simple interest of
(a) \$120 at 4% p.a. in 3 years,
(b) \$1500 at 3% p.a. in 2 years,
(c) \$315 at 3% p.a. in 7 months.

5.
Find the interest rate per annum if
(a) \$12000 earns a simple interest of \$360 in 2 years,
(b) \$1500 earns a simple interest of \$150 in 5 years,
(c) \$4500 earns a simple interest of \$101.25 in 9 months.