Quiz : Testez vos connaissances en mathématiques 9ème année !

Question 1 sur 10 10:00

[{"id":15148,"question":"Quelle est la solution de l'équation 3x - 5 = 10 ?","option_a":"x = 5","option_b":"x = 15\/3","option_c":"x = 5\/3","option_d":"x = 15","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x - 5 = 10, on ajoute 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":15149,"question":"La somme des angles d'un triangle est toujours égale à 180°.","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 internes d'un triangle est toujours 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15150,"question":"Quelle est la valeur de (-2)^3 ?","option_a":"-8","option_b":"8","option_c":"-6","option_d":"6","option_e":"","option_f":"","bonne_reponse":"A","explication":"(-2)^3 = (-2) × (-2) × (-2) = -8. Une puissance impaire d'un nombre négatif reste négative.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15151,"question":"Si un quadrilatère a ses côtés opposés parallèles, alors c'est un parallélogramme.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est une définition du parallélogramme : un quadrilatère dont les côtés opposés sont parallèles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15152,"question":"Quelle est la solution de l'inéquation 2x + 3 \u003C 7 ?","option_a":"x \u003C 2","option_b":"x \u003E 2","option_c":"x \u003C -2","option_d":"x \u003E -2","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 2x + 3 \u003C 7, on soustrait 3 : 2x \u003C 4. Puis on divise par 2 : x \u003C 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15153,"question":"Le périmètre d'un cercle est donné par la formule P = 2πr.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La formule du périmètre d'un cercle est bien P = 2πr, où r est le rayon du cercle.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15154,"question":"Quelle est la valeur de 5\/6 + 2\/3 ?","option_a":"7\/6","option_b":"1","option_c":"1\/2","option_d":"11\/6","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour additionner 5\/6 et 2\/3, on met au même dénominateur : 5\/6 + 4\/6 = 9\/6 = 3\/2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15155,"question":"Un angle de 90° est appelé angle droit.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un angle de 90° est effectivement appelé angle droit, une notion clé en géométrie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15156,"question":"Quelle est la solution de l'équation x² - 4x + 4 = 0 ?","option_a":"x = 2","option_b":"x = -2","option_c":"x = 4","option_d":"x = 0","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'équation x² - 4x + 4 = 0 peut s'écrire (x - 2)² = 0. La solution est donc x = 2 (racine double).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15157,"question":"Le volume d'un cube de côté a est donné par V = a³.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La formule du volume d'un cube est bien V = a³, où a est la longueur de son côté.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]