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Question 1 sur 10 10:00

[{"id":14258,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = 7","option_d":"x = 4","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x + 5 = 20, soustrayez 5 des deux côtés : 3x = 15. Divisez ensuite par 3 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14259,"question":"Le carré d'un nombre négatif est toujours positif.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un nombre négatif multiplié par lui-même donne un résultat positif (exemple : (-3)² = 9).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14260,"question":"Quelle est la formule de l'aire d'un triangle ?","option_a":"A = base × hauteur","option_b":"A = (base × hauteur) \/ 2","option_c":"A = côté × côté","option_d":"A = π × rayon²","option_e":"","option_f":"","bonne_reponse":"B","explication":"L'aire d'un triangle se calcule avec la formule A = (base × hauteur) \/ 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14261,"question":"Si f(x) = 2x + 3, quelle est l'image de 4 par f ?","option_a":"f(4) = 11","option_b":"f(4) = 8","option_c":"f(4) = 5","option_d":"f(4) = 10","option_e":"","option_f":"","bonne_reponse":"A","explication":"Remplacez x par 4 dans f(x) : f(4) = 2 × 4 + 3 = 8 + 3 = 11.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14262,"question":"La somme des angles d'un triangle est égale à 180 degrés.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est une propriété fondamentale de la géométrie plane : la somme des angles d'un triangle est toujours 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14263,"question":"Quelle est la solution de l'inéquation 2x - 7 \u003E 5 ?","option_a":"x \u003E 6","option_b":"x \u003E 12","option_c":"x \u003C 6","option_d":"x \u003E 1","option_e":"","option_f":"","bonne_reponse":"A","explication":"Ajoutez 7 des deux côtés : 2x \u003E 12. Divisez par 2 : x \u003E 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14264,"question":"Le périmètre d'un carré de côté 5 cm est de 20 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 avec P = 4 × côté. Ici, P = 4 × 5 = 20 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14265,"question":"Quelle est la dérivée de la fonction f(x) = x² ?","option_a":"f'(x) = 2x","option_b":"f'(x) = x","option_c":"f'(x) = x²","option_d":"f'(x) = 2","option_e":"","option_f":"","bonne_reponse":"A","explication":"La dérivée de x² est 2x, selon la règle de dérivation des fonctions puissances.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14266,"question":"Si deux droites sont parallèles, leurs coefficients directeurs sont égaux.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Deux droites parallèles ont le même coefficient directeur (pente).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14267,"question":"Quelle est la solution de l'équation x² - 9 = 0 ?","option_a":"x = 3","option_b":"x = -3","option_c":"x = 3 ou x = -3","option_d":"x = 9","option_e":"","option_f":"","bonne_reponse":"C","explication":"x² - 9 = 0 ⇒ x² = 9 ⇒ x = 3 ou x = -3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]