Quiz Mathématiques — 9ème année : Testez vos connaissances !

Question 1 sur 10 10:00

[{"id":43756,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15\/3","option_c":"x = 15","option_d":"x = 5\/3","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x + 5 = 20, on soustrait 5 des deux côtés : 3x = 15, puis on divise par 3 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43757,"question":"Le périmètre d'un carré de côté 4 cm est de 16 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un carré se calcule par P = 4 × côté. Ici, 4 × 4 = 16 cm, donc l'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43758,"question":"Quel est le volume d'un cube de 3 cm d'arête ?","option_a":"9 cm³","option_b":"12 cm³","option_c":"27 cm³","option_d":"81 cm³","option_e":"","option_f":"","bonne_reponse":"C","explication":"Le volume d'un cube se calcule par V = arête³. Ici, 3³ = 27 cm³.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43759,"question":"Si deux angles d'un triangle mesurent 45° et 60°, le troisième angle mesure :","option_a":"75°","option_b":"65°","option_c":"85°","option_d":"105°","option_e":"","option_f":"","bonne_reponse":"A","explication":"La somme des angles d'un triangle est de 180°. Donc, 180 - 45 - 60 = 75°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43760,"question":"Un pourcentage de 25% correspond à la fraction :","option_a":"1\/2","option_b":"1\/4","option_c":"3\/4","option_d":"1\/5","option_e":"","option_f":"","bonne_reponse":"B","explication":"25% équivaut à 25\/100, soit 1\/4 après simplification.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43761,"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.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43762,"question":"Résolvez l'inéquation : 2x - 7 \u003E 5.","option_a":"x \u003E 6","option_b":"x \u003E 12","option_c":"x \u003E 1","option_d":"x \u003E 3","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 2x - 7 \u003E 5, on ajoute 7 : 2x \u003E 12, puis on divise par 2 : x \u003E 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43763,"question":"L'aire d'un disque de rayon 5 cm est d'environ :","option_a":"25π cm²","option_b":"10π cm²","option_c":"50π cm²","option_d":"78,5 cm²","option_e":"","option_f":"","bonne_reponse":"D","explication":"L'aire d'un disque se calcule par A = π × rayon². Ici, π × 5² ≈ 78,5 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43764,"question":"Si a = 2 et b = -3, alors a × b = :","option_a":"6","option_b":"-6","option_c":"1","option_d":"-5","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le produit de 2 et -3 est égal à -6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43765,"question":"Un angle de 90° est appelé un angle :","option_a":"aigu","option_b":"obtus","option_c":"droit","option_d":"plat","option_e":"","option_f":"","bonne_reponse":"C","explication":"Un angle de 90° est appelé un angle droit.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]