2012 masmo contest paper - upper primary

Copyright © 2012 byMalaysia ASEANScience &MathOlympiads.All rights reserved.

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PPPP MALAYSIAMALAYSIAMALAYSIAMALAYSIA ASEANASEANASEANASEAN SCIENCESCIENCESCIENCESCIENCE&&&& MATHMATHMATHMATH OOOOLYMPIADSLYMPIADSLYMPIADSLYMPIADS

2020202011112222 CONTESTCONTESTCONTESTCONTEST

FullFullFullFull NameNameNameName： Year:Year:Year:Year: DaDaDaDatetetete： TimeTimeTimeTime：

SchoolSchoolSchoolSchool NameNameNameName： SchoolSchoolSchoolSchool CodeCodeCodeCode：

RulesRulesRulesRules andandandand RegulationsRegulationsRegulationsRegulations(Please(Please(Please(Please readreadreadread thesethesethesethese rulesrulesrulesrules andandandand regulationregulationregulationregulation carefully)carefully)carefully)carefully)

1. Please fill in your FULLFULLFULLFULL namenamenamename correctly, school name, school code and the date and time ofcontest clearly in the spaces above. Those who do not fill in the required particulars will bedisqualified automatically.

2. Do not open the question booklet until you are told to do so. You may only use 2B2B2B2B pencil whenanswering the questions.

3. No calculators and any unauthorised electronic devices (including mobile phones) are allowedduring the contest.

4. Strict silence must be observed at all times in the examination hall and please be reminded thatyou MAYMAYMAYMAY NOTNOTNOTNOT leave your seat without permission.

5. If you have any request or enquiry, please raise your hand and wait for an invigilator.

6. Only one candidate is allowed to leave the hall at a time. You are required to return to the hallwithin 10 minutes or else you will automatically be disqualified from the contest.

7. Each question in the contest have been verified by experienced trainers, thus no furtherexplanation will be given.

8. The time allowed for the paper is 111120202020 minutesminutesminutesminutes. You must stop writing when you are told to doso.

9. You MUSTMUSTMUSTMUST fill in your answer in the answeransweransweranswer sheetsheetsheetsheet provided in second page of the questionbooklet. You will not be awarded marks for any answer written in the question booklet.

10. Please be reminded that this is a contest and not an examination, do not expect to answer alltypes of questions.

11. PleasePleasePleasePlease teartearteartear offoffoffoff thethethethe answeransweransweranswer sheetsheetsheetsheet carefullycarefullycarefullycarefully andandandand returnedreturnedreturnedreturned totototo invigilatorinvigilatorinvigilatorinvigilator .... ParticipantParticipantParticipantParticipant cancancancanbringbringbringbring backbackbackback thethethethe contestcontestcontestcontest paper.paper.paper.paper.

ScoringScoringScoringScoring SystemSystemSystemSystem1. The correct answer to each problem will be awarded one (1) point. However, you will NOT be

penalised for each incorrect answer.

2. The organizer reserves the right to disqualify the event of malpractice to differentiate betweenthose outstanding students.

3. Contestants or a team who are disqualified from the contest will be forfeited any right to re-sitthis year.






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2020202011112222ANSWERANSWERANSWERANSWER SHEETSHEETSHEETSHEET






3333 Three friends play a series of 8 games. The winner of eachgame scores 8 points. Second place scores 3 points. Last placescores 0 points. At the end of 8 games, Keri's score is 20 points.In how many of the games did Keri finish last?

4444 The sum of the digits of the number 2010 is 3. What is the nextlarger number whose digit-sum is also 3?

5555 In the pattern below, what will be the 78th letter written?

ABBCCDABBCCDA.......(andABBCCDABBCCDA.......(andABBCCDABBCCDA.......(andABBCCDABBCCDA.......(and sosososo on)on)on)on)

1111 Write the value of this expression as a whole number.

(20+40+60+80+100+120) - (10+30+50+70+90+110)

2222 In a group of dogs and their owners, there are exactly 20heads and 64 legs. How many dogs are in the group?






9999 Suppose the boxes are filled in with thedigits from 0 through 6. Each digit is writtenexactly once. What three-digit number is thecorrect answer to the addition problem?

7777 How many 2-digit numbers have one digit that is twicethe other?

6666 If you triple Jen's age and subtract 16, the result will be thesame as when you double her age and add 8. How old is Jen?

10101010 At lunch, Hannah tells Dom, " If you give me 4 grapes, we willeach have the same number of grapes." Dom tells Hannah,"Ifyou give me 4 grapes, I will have five times as many grapes asyou will have then." How many grapes does Hannah have?

8888 In a magic square, the sum of the numbersin each row and each column is the same. Ifexactly one number is changed in thispicture, the result is a magic square. Whichnumber must be changed?






11111111 Staci looks at the first and fourth pages of achapter in her book. The sum of their pagenumbers is 47. On what page does thechapter begin?

11114444 The perimeter of a rectangular piece ofpaper is 50cm. It is cut into 4 congruentrectangles as shown. What is the total of theperimeters of the four smaller rectangles?

15151515 AB, CD, EF, GH and JK are five 2-digitnumbers. Different letters represent differentdigits. Find the greatest possible value of thefraction below.

AB+CD+EFGH－JK

11113333 Vera makes vegetable trays. Each tray uses of a pound ofcarrots. Vera needs to make 25 trays. She buys carrots only in 2- pound bags. How many bags of carrots must Vera buy to makethe 25 trays?

12121212 If the 5-digit number 3367N is divisible by 15, what is the digit N?






16161616 How many four sided figures can be raced,using the lines in this picture?

17171717 Different letters represent different digits. If ADD + ADD + ADD= SUMS and A is even, what is the 4-digit number SUMS?

18181818 This figure consists of two squares. Eachside-length is a whole number ofcentimeters. The combined areas of thesquares is 100 sq cm. What is the perimeterof the entire figure?

19191919 A pile of coins sits on a table. Sara takes half of the coins plus 4more. Then Nick takes 2. Then Joe take 2 more than half ofwhat is left. Finally Selena takes 5. Four coins remain on thetable. How many coins were on the table to start with?

20202020 1 blue marble and 2 green marbles cost 16 cents. 1 red marbleand 2 blue marbles also cost 16 cents. 1 green marble and 2red marbles only cost 13 cents. How much does 1 green marblecost?






21212121 The perimeter of rectangle ABCD is 36cm.Suppose side AD is folded up so that D lieson the midpoint of side AB and AE is thecrease as shown. What is the area of figureABCE?

22222222 25 students average 91 marks in a Mathematics test. If Ashleyremoved her score, the average marks of the remainingstudents would be 93. What was Ashley's score in themathematics Test ?

23232323 The digits 1 through 9 are placed in theboxes shown, one per box. In each cornerbox is a prime number. In each box in themiddle column is a square number. In the 3boxes of the middle row is the least 3-digitnumber possible. What is that 3-digitnumber?

24242424 Different letters represent different digits. ABis an even 2-digit number. EEE is a 3-digitnumber. Find the 2-digit number AB.

25252525 A rectangular solid that is 4cm by 6cm by 8cm is painted on allsix faces. Then the solid is cut into cubes that measure 2 cm oneach side.How many of these cubes have only one face painted?

ABEEEM

2012 masmo contest paper - upper primary

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