MSHS Prelim P1 EM Markers Report 2025

This document consists of 24 printed pages. [Turn over For Examiner’s Use Subtotal Statement Presentation Units Rounding off Class/ Index Number Centre Number/ ‘O’ Level Index Number Name / / MARIS STELLA HIGH SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR MATHEMATICS 4052/1 Paper 1 18 August 2025 Candidates answer on the Question Paper. 2 hours 15 minutes READ THESE INSTRUCTIONS FIRST Write your class, index number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all the questions. The number of marks is given in brackets [ ] at the end of each question or part question. If working is needed for any question it must be shown with the answer. Omission of essential working will result in loss of marks. The total of the marks for this paper is 90. The use of an approved scientific calculator is expected, where appropriate. If the degree of accuracy is not specified in the question and if the answer is not exact, give the answer to three significant figures. Give answers in degrees to one decimal place. For  , use either your calculator value or 3.142. 90

2 Mathematical Formulae Compound interest Total amount = 1 100 n rP+ Mensuration Curved surface area of a cone = rl Surface area of a sphere = 24 r Volume of a cone = 21 3 rh Volume of a sphere = 34 3 r Area of triangle ABC = 1 sin2 ab C Arc length = r , where  is in radians Sector area = 21 2 r  , where  is in radians Trigonometry A a sin = B b sin = C c sin 2 2 2 2 cosa b c bc A= + − Statistics Mean =   f fx Standard deviation = 22       −     f fx f fx

3 1 Simplify ( )( ) 3 22x x x x− + − . 𝑥3 − 𝑥(𝑥 + 2)(𝑥 − 2) = 𝑥3 − 𝑥(𝑥2 − 4) = 𝑥3 − 𝑥3 + 4𝑥 = 4𝑥 Answer ............................................. [2] 2 Represent the solution set of the simultaneous inequalities 3x and 26 x−   on the number line below. Answer [1] 0 2 1 4 3 6 5 7 2 x 23 x−   Markers Report Well done but a few expanded wrongly Markers Report Well done but some did not draw final number line (shading alone not accepted)

4 3 The cash price for a car was $150000 . Sally paid a downpayment of $90000 and paid the remaining amount by monthly instalments for 5 years. A simple interest of %x per annum was charged and that her monthly instalment was $1090 . (a) Find the value of x . ( )( ) 150000 90000 60000 1090 5 12 65400 Interest 65400 60000 5400 60000 55400 100 1.8 x x −=   = =− = = = Answer x = ........................................ [4] (b) Calculate the extra cost of using hire purchase as a percentage of the cash pri