Grade 7 / Other 6 exercises (100% corrected)

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BurkinaFasoCôted’IvoireGhanaMaliSénégalTogo01234567891011(enmillions) 1. Staffing and Charts E.5636 The bar chart below represents the number of people aged under 18 ans in 6 West African coun-tries in 2008 : UNICEF is the source of this data. Complete the following table : Burk. C.I. Ghana Mali Sén. Togo Total Effectif en millions 2. Deductive reasoning: counter-example E.4390 Each of the properties below is false. Give a counterexample to each of these properties : 1 If an integer is a multiple of 2 then it is a multiple of 4. 2 If a quadrilateral has its diagonals perpendicular then that quadrilateral is a square. 3 If two angles are adjacent then those are two complemen-tary angles. 4 If triangle ABC is isosceles then AB = AC . E.395 Each of the following statements is false. For each one, give a counterexample that shows the statement is false. 1 If the units digit of an integer is 9 , then that integer is divisible by 3 . 2 The sum of two odd integers is odd. 3 If a quadrilateral is a parallelogram, then its diagonals are of equal length. 4 If the sum of two numbers is negative, then both numbers are negative. 3. Deductive reasoning: reciprocal proposition E.1751 1 For each of the following propositions, write its reciprocal proposition : a If the units digit of an integer is 0 or 5 then that integer is divisible by 5 b If a quadrilateral is a square then its four sides are of the same length. c If a point is equidistant from the ends of a segment then that point belongs to the perpendicular bisector of that segment. 2 Which of the reciprocal propositions listed are false? Cite counterexamples. E.397 1 For each of the following propositions, give the writing of the reciprocal proposition : a If two integers are even then the sum of these integers is even. b If an integer has 0 , 2 , 4 , 6 or 8 as its units digit then that integer is even. c If a quadrilateral is a rhombus then its diagonals are perpendicular to each other. d If I is the middle of segment [ AB ] then IA = IB 2 Which of the reciprocal propositions listed are false? Cite counterexamples. 4. Unclassified exercises https://chingmath.fr chapExoCorrec/5636 sacados/5636 BurkinaFasoCôted’IvoireGhanaMaliSénégalTogo01234567891011(enmillions) chapExoCorrec/4390 sacados/4390 chapExoCorrec/395 sacados/395 chapExoCorrec/1751 sacados/1751 chapExoCorrec/397 sacados/397
AgdeMarseillanSèteMirevalMontpellierNîmes27kmMireval96kmNîmesAgde11km54kmNîmesSète30kmAgde53km AgdeMarseillanMarseillanSèteSèteMirevalMirevalMontpellierMontpellierNîmes E.6335 A departmental road connects the cities of Agde, Marseillan, Sète, Mireval, Montpellier and Nîmes. The diagram below represents this road and some informa-tion about the distances between these cities: 1 Complete the double-entry table below to find the dis-tance in kilometers between two cities on the route. 2 Frontignan is a town between Sète and Mireval. Deter-mine the distance between Montpellier and Frontignan. https://chingmath.fr chapExoCorrec/6335 sacados/6335 AgdeMarseillanSèteMirevalMontpellierNîmes27kmMireval96kmNîmesAgde11km54kmNîmesSète30kmAgde53km AgdeMarseillanMarseillanSèteSèteMirevalMirevalMontpellierMontpellierNîmes