Hua Yi Sec Sch P1 2020

,., ' ,t \) ;\I jf I Name:_ ' I I Index Number: I Class: .N' 'I . \A ' ' I @ HUA YI SECONDARY SCHOOL Preliminary Examination MATH:EM-ATICS I ' Paper1 . Candidates answer on the Question Paper. 4045/1 -· 4 August 2020 2h ,, -'· :, l--r=-------------------------------------, ,, ' READ T'f.lESE INSFRU :Cl110NS~FIRST W.riite your Name, Class and Index Number in the spaces provided at the top of this pag~. Write your answers in the spaces provided on the question paper. ·1,~rite in dark blue or black pen. , You may use a pencil for any diagrams or graphs. Answer all questions. If war-king is needed for any question it must be shown in the space below that question. The use of an approved scientific calculator is expected, where appropriate. If the degree 9f accuracy is not specified in the question, and if the answer is not exact, give the· answer to three significant figures. Give your answers in degrees to one decimal place. For n, use either your calculator value or 3.142, unless the question requires the answer in tentls of n. The number of marks is given in brackets [ ] at the end of each question or part question. The ,total number of marks for this paper is 80. For Examiners Use This doeunieAt consists of 1'5 printed pages including the cover page. ©HYSS2020 No part of this · document may be repmdUced In any fonn•or transmitted In any fonn or by any means with t th . pennlssion of Hua Yi Secondary School. . ou e pnor [Turn Over

Compound interest Mensuration Trigonometry · -".statistics 2 Mathematical Formulae Total amount= J l + _:.....)" , l 100 Curved surface area of a cone = ,rr/ Surface area of a sphere= 4,rr 2 1 Volume of a cone = - ,rr 2 h 3 4 Volume of a sphere = - ,rr 3 3 Area of triangle ABC .!. ab,sin.C 2 Ardength = r(J', where 0 is in radians 1 Sector area = - r 2 (} , where 0 is in radians 2 a b c --=--=--sinA sinB sine a 2 =b 2 +c 2 -2bccosA Mean= 'I.ft 'I.I Standanl devration = -( 'I. fx) 2 "f.J "f.J Sec 4NA Preliminary Examination 2020 Mathematics Paper 1

3 Answer all the questions. 1 (a) Express 0.013 as a percentage. Answer _____ 0_1/o_ [I] (b) Express 56.6% as a fraction. Answer ______ [I] 2 (a) Written as a product of:its prime factors, 18225= 36 x 52 . 3 Without using a calculat9r, find the square root of 18225, leaving your answer in index notation. --o- Answer _____ [1] (b) Explain why the product of 5 and 18225 is a perfect cube. (a) Answer __________________________ _ -------------------- [1] ~;. 5 , ,solve --= 3. (2x-6) Answer _____ [2] (b) E _ 1_ + _2 _ as a single fraction, in its simplest form, . xpress (x2-9) (x+3) Answer _____ [3] . . E amination 2020 Mathematics Paper 1 sec 4NA Prehmmary x

4 \ \ 4 John said that the following is part of a regular polygon. Is he correct? Support your explanation with workings. \ \ \ \ \ \ \ Answer 5 (a) A is inversely proportional to B2. When B = 4 , A =2. Find the value of A when