Quiz de révision : Mathématiques 7ème année — Calcul, Géométrie et Problèmes

Question 1 sur 10 10:00

[{"id":22688,"question":"Quel est le résultat de l'opération 45 × 12 ?","option_a":"540","option_b":"560","option_c":"480","option_d":"600","option_e":"","option_f":"","bonne_reponse":"A","explication":"45 × 12 = 540. Pour vérifier, on peut décomposer : 45 × 10 = 450 et 45 × 2 = 90, puis additionner 450 + 90 = 540.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22689,"question":"Vrai ou Faux ? 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 par 4 × côté. Ici, 4 × 5 = 20 cm. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22690,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = 4","option_d":"x = 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":22691,"question":"Vrai ou Faux ? L'aire d'un rectangle de longueur 8 cm et de largeur 3 cm est de 24 cm².","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule par longueur × largeur. Ici, 8 × 3 = 24 cm². L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22692,"question":"Quel est le résultat de 125 ÷ 5 ?","option_a":"25","option_b":"20","option_c":"30","option_d":"15","option_e":"","option_f":"","bonne_reponse":"A","explication":"125 ÷ 5 = 25. On peut vérifier en multipliant 25 × 5 = 125.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22693,"question":"Vrai ou Faux ? 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 d'un triangle est toujours 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22694,"question":"Quelle est la conversion correcte de 2,5 km en mètres ?","option_a":"250 m","option_b":"2 500 m","option_c":"25 m","option_d":"25 000 m","option_e":"","option_f":"","bonne_reponse":"B","explication":"1 km = 1 000 m, donc 2,5 km = 2,5 × 1 000 = 2 500 m.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22695,"question":"Vrai ou Faux ? Pour calculer le périmètre d'un cercle, on utilise la formule P = 2 × π × r.","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 = 2 × π × r, où r est le rayon.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22696,"question":"Quel est le résultat de l'opération (15 + 7) × 2 ?","option_a":"44","option_b":"22","option_c":"34","option_d":"24","option_e":"","option_f":"","bonne_reponse":"A","explication":"On commence par calculer la parenthèse : 15 + 7 = 22, puis on multiplie par 2 : 22 × 2 = 44.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22697,"question":"Vrai ou Faux ? Un angle droit mesure 90°.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Par définition, un angle droit mesure exactement 90°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]