Quiz de révision : Mathématiques 9ème année — Algèbre & Géométrie

Question 1 sur 10 10:00

[{"id":74812,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = -5","option_d":"x = 25","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x + 5 = 20, soustrayez 5 des deux côtés : 3x = 15, puis divisez par 3 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74813,"question":"Le théorème de Pythagore s'applique uniquement aux triangles rectangles.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le théorème de Pythagore est valable uniquement pour les triangles rectangles, où le carré de l'hypoténuse est égal à la somme des carrés des deux autres côtés.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74814,"question":"Quelle est la valeur de 2³ × 2² ?","option_a":"2⁵","option_b":"2⁶","option_c":"4⁵","option_d":"4⁶","option_e":"","option_f":"","bonne_reponse":"A","explication":"Lorsqu'on multiplie des puissances de même base, on additionne les exposants : 2³ × 2² = 2^(3+2) = 2⁵.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74815,"question":"L'aire d'un triangle est donnée par la formule : (base × hauteur) \/ 2.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La formule correcte pour calculer l'aire d'un triangle est bien (base × hauteur) divisé par 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74816,"question":"Résolvez l'équation : 4(x - 3) = 20.","option_a":"x = 8","option_b":"x = 5","option_c":"x = 11","option_d":"x = 7","option_e":"","option_f":"","bonne_reponse":"B","explication":"Divisez d'abord par 4 : x - 3 = 5, puis ajoutez 3 : x = 8. La bonne réponse est x = 8.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74817,"question":"Le périmètre d'un carré de côté 5 cm est de 25 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le périmètre d'un carré se calcule par 4 × côté. Ici, 4 × 5 = 20 cm, donc la réponse est fausse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74818,"question":"Quelle est la valeur de √(16) + √(9) ?","option_a":"5","option_b":"7","option_c":"9","option_d":"10","option_e":"","option_f":"","bonne_reponse":"B","explication":"√(16) = 4 et √(9) = 3. Donc, 4 + 3 = 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74819,"question":"Un angle de 90° est appelé angle plat.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un angle de 90° est un angle droit, tandis qu'un angle plat mesure 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74820,"question":"Calculez : (5\/2) + (3\/4).","option_a":"8\/6","option_b":"13\/4","option_c":"10\/4","option_d":"11\/4","option_e":"","option_f":"","bonne_reponse":"B","explication":"Mettez les fractions au même dénominateur : (10\/4) + (3\/4) = 13\/4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":74821,"question":"Le volume d'un cube de côté 3 cm est de 27 cm³.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le volume d'un cube se calcule par côté³. Ici, 3³ = 27 cm³, donc la réponse est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]