Choix de la bonne réponse en mathématiques — Niveau Collège

Question 1 sur 10 10:00

[{"id":43436,"question":"Quelle est la valeur de x dans l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 4","option_c":"x = 6","option_d":"x = 3","option_e":"","option_f":"","bonne_reponse":"A","explication":"En soustrayant 5 des deux côtés, on obtient 3x = 15. En divisant par 3, on trouve x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43437,"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 4 × côté. Ici, 4 × 4 = 16 cm, donc c'est vrai.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43438,"question":"Quel est le résultat de 7\/8 + 3\/8 ?","option_a":"10\/8","option_b":"1","option_c":"10\/16","option_d":"1\/2","option_e":"","option_f":"","bonne_reponse":"A","explication":"En additionnant les numérateurs (7 + 3 = 10) et en gardant le dénominateur commun (8), on obtient 10\/8, qui se simplifie en 5\/4 ou 1,25.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43439,"question":"Un rectangle a une longueur de 10 cm et une largeur de 5 cm. Quelle est son aire ?","option_a":"50 cm²","option_b":"30 cm²","option_c":"15 cm²","option_d":"25 cm²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule par longueur × largeur. Ici, 10 × 5 = 50 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43440,"question":"Le nombre 0,75 est égal à 3\/4.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"0,75 est la forme décimale de 3\/4, donc c'est vrai.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43441,"question":"Résoudre l'inéquation : 2x - 3 \u003E 7.","option_a":"x \u003E 5","option_b":"x \u003C 5","option_c":"x \u003E 2","option_d":"x \u003C 2","option_e":"","option_f":"","bonne_reponse":"A","explication":"En ajoutant 3 des deux côtés, on obtient 2x \u003E 10. En divisant par 2, on trouve x \u003E 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43442,"question":"Quel est le résultat de 0,2 × 0,5 ?","option_a":"0,1","option_b":"0,10","option_c":"1","option_d":"0,01","option_e":"","option_f":"","bonne_reponse":"A","explication":"0,2 × 0,5 = 0,10, qui s'écrit aussi 0,1.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43443,"question":"Un triangle rectangle a des côtés de 3 cm, 4 cm et 5 cm. Son aire est de 6 cm².","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un triangle rectangle se calcule par (base × hauteur) \/ 2. Ici, (3 × 4) \/ 2 = 6 cm², donc c'est vrai.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43444,"question":"Quel est le résultat de 15% de 200 ?","option_a":"30","option_b":"20","option_c":"15","option_d":"300","option_e":"","option_f":"","bonne_reponse":"A","explication":"15% de 200 se calcule par (15\/100) × 200 = 30.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":43445,"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 : la somme des angles d'un triangle est toujours 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]