Numbers, Ratio & Proportion

Mrs Tan exchanges SGD 2500 for Malaysian ringgit at 1 SGD = 3.00 MYR. He spends MYR 3000 on accommodation and food, and buys 100 litres of fuel at MYR 2.40 per litre. He exchanges the remaining MYR back at 1 SGD = 3.10 MYR and receives SGD 80. (a) Calculate the MYR remaining before he converted back. [2] (b) Show, with working, whether he has enough to cover the return trip (assume same fuel needs). [2] (c) A bank offers the conversion at 1 SGD = 2.95 MYR but charges a 1.5% conversion fee. Compare this against the original rate and justify which is better. [3]

A home appliance shop buys a air fryer at a cost price. The shopkeeper marks up the cost price by 50% and lists it at a marked price of $1200. During a sale, the air fryer is sold at a 30(a) Find the marked price of the air fryer. [Already given as$1200; verify by computation.] [1] (b) Find the selling price after the discount. [1] (c) Find the original cost price of the air fryer. [2]

Mdm Noor invests a principal of $10000 with OCBC at 4% per annum compounded yearly for 5 years. (a) Write down the formula for the total amount A after n years in terms of P and r. [1] (b) Calculate the total amount in the account after 5 years, giving your answer correct to the nearest cent. [3]