Quiz interactif : Algèbre et géométrie pour la 9ème année

Question 1 sur 10 10:00

[{"id":24828,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = 5\/3","option_d":"x = 4","option_e":"","option_f":"","bonne_reponse":"A","explication":"Soustraire 5 des deux côtés : 3x = 15, puis diviser par 3 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24829,"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":24830,"question":"Quelle est l'aire d'un rectangle de longueur 8 cm et de largeur 5 cm ?","option_a":"40 cm²","option_b":"13 cm²","option_c":"30 cm²","option_d":"26 cm²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule par longueur × largeur : 8 × 5 = 40 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24831,"question":"Si un triangle a des côtés de 3 cm, 4 cm et 5 cm, est-il rectangle ?","option_a":"Oui","option_b":"Non","option_c":"On ne peut pas savoir","option_d":"Seulement si l'angle est de 90°","option_e":"","option_f":"","bonne_reponse":"A","explication":"3² + 4² = 9 + 16 = 25 = 5², donc c'est un triangle rectangle.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24832,"question":"La formule de l'aire d'un cercle est πr².","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La formule correcte est π × rayon².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24833,"question":"Résoudre l'équation 2(x - 3) = 4.","option_a":"x = 5","option_b":"x = 1","option_c":"x = 2","option_d":"x = -1","option_e":"","option_f":"","bonne_reponse":"A","explication":"Diviser par 2 : x - 3 = 2, puis ajouter 3 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24834,"question":"Un cube de côté 4 cm a un volume de 64 cm³.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le volume d'un cube est côté³ : 4³ = 64 cm³.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24835,"question":"Quelle est la solution de l'équation 5x - 2 = 3x + 8 ?","option_a":"x = 5","option_b":"x = 3","option_c":"x = 10","option_d":"x = -3","option_e":"","option_f":"","bonne_reponse":"A","explication":"Soustraire 3x : 2x - 2 = 8, puis ajouter 2 : 2x = 10, enfin diviser par 2 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24836,"question":"Le périmètre d'un carré de côté 6 cm est de 24 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un carré est 4 × côté : 4 × 6 = 24 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":24837,"question":"Quelle est la valeur de x dans l'équation 7x + 1 = 2x + 16 ?","option_a":"x = 3","option_b":"x = 5","option_c":"x = 15","option_d":"x = 2","option_e":"","option_f":"","bonne_reponse":"A","explication":"Soustraire 2x : 5x + 1 = 16, puis soustraire 1 : 5x = 15, enfin diviser par 5 : x = 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]