Quiz de révision : Algèbre et géométrie pour le collège

Question 1 sur 10 10:00

[{"id":72042,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = 10","option_d":"x = 25","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x + 5 = 20, soustrayez 5 des deux côtés : 3x = 15, puis divisez par 3 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72043,"question":"Un triangle rectangle a un angle de 30°. Quel est la mesure de l'autre angle aigu ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Dans un triangle rectangle, la somme des angles est 180°. Si un angle est 90° et un autre 30°, le troisième mesure 60°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72044,"question":"Quelle est la formule de l'aire d'un rectangle ?","option_a":"A = L × l","option_b":"A = π × r²","option_c":"A = (B + b) × h \/ 2","option_d":"A = c²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule en multipliant sa longueur (L) par sa largeur (l).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72045,"question":"Le nombre -5 est-il un nombre entier ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Les nombres entiers incluent les entiers naturels (0, 1, 2, ...) et leurs opposés (-1, -2, ...). -5 est donc un entier.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72046,"question":"Quelle est la solution de l'équation 2(x - 3) = 10 ?","option_a":"x = 8","option_b":"x = 5","option_c":"x = 13","option_d":"x = 7","option_e":"","option_f":"","bonne_reponse":"A","explication":"Développez d'abord : 2x - 6 = 10. Ajoutez 6 : 2x = 16. Divisez par 2 : x = 8.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72047,"question":"Un carré a un côté de 4 cm. Quel est son périmètre ?","option_a":"16 cm","option_b":"8 cm","option_c":"4 cm","option_d":"32 cm","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un carré se calcule en multipliant la longueur d'un côté par 4 : 4 × 4 = 16 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72048,"question":"L'équation x² = 16 a-t-elle deux solutions ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Les solutions sont x = 4 et x = -4, donc l'équation a bien deux solutions.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72049,"question":"Quelle est la valeur de 3² + 4² ?","option_a":"25","option_b":"12","option_c":"18","option_d":"7","option_e":"","option_f":"","bonne_reponse":"A","explication":"3² = 9 et 4² = 16. La somme est 9 + 16 = 25.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72050,"question":"Un parallélogramme a des côtés de 5 cm et 7 cm. Quel est son périmètre ?","option_a":"12 cm","option_b":"24 cm","option_c":"35 cm","option_d":"17 cm","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le périmètre d'un parallélogramme est la somme des longueurs de ses côtés : 5 + 7 + 5 + 7 = 24 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72051,"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 d'un triangle est toujours 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]