Quiz Maths 7ème : Testez vos connaissances en synthèse !

Question 1 sur 10 10:00

[{"id":14248,"question":"Quelle est la valeur de l'expression 3 × (2 + 4) ?","option_a":"18","option_b":"14","option_c":"20","option_d":"9","option_e":"","option_f":"","bonne_reponse":"A","explication":"La priorité des opérations donne : 3 × 6 = 18. Les parenthèses sont calculées en premier.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14249,"question":"Un triangle isocèle a deux côtés de 5 cm et un côté de 8 cm. Son périmètre est de 18 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre est 5 + 5 + 8 = 18 cm. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14250,"question":"Quelle est la solution de l'équation 2x + 3 = 7 ?","option_a":"x = 2","option_b":"x = 5","option_c":"x = 3","option_d":"x = 4","option_e":"","option_f":"","bonne_reponse":"A","explication":"En soustrayant 3 puis en divisant par 2 : 2x = 4 → x = 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14251,"question":"La fraction 12\/18 est irréductible.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"12\/18 = 2\/3 après simplification par 6. La fraction n'est donc pas irréductible.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14252,"question":"Quel est le résultat de (-3)² ?","option_a":"9","option_b":"-9","option_c":"6","option_d":"-6","option_e":"","option_f":"","bonne_reponse":"A","explication":"(-3)² = (-3) × (-3) = 9. Le carré d'un nombre négatif est positif.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14253,"question":"Un quadrilatère avec deux côtés parallèles est toujours un parallélogramme.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un trapèze a deux côtés parallèles mais n'est pas toujours un parallélogramme. La réponse est donc fausse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14254,"question":"Quelle est la valeur de 5³ ?","option_a":"15","option_b":"25","option_c":"125","option_d":"50","option_e":"","option_f":"","bonne_reponse":"C","explication":"5³ = 5 × 5 × 5 = 125. C'est une puissance à connaître.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14255,"question":"La somme des angles d'un triangle est toujours de 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. L'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14256,"question":"Quelle est la solution de l'inéquation x - 4 \u003E 2 ?","option_a":"x \u003E 6","option_b":"x \u003C 6","option_c":"x \u003E 2","option_d":"x \u003C 2","option_e":"","option_f":"","bonne_reponse":"A","explication":"En ajoutant 4 des deux côtés : x \u003E 6. Les inéquations se résolvent comme les équations.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":14257,"question":"Un cercle de rayon 5 cm a une aire de π × 5² cm².","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La formule de l'aire d'un cercle est π × r². Avec r = 5, l'aire est bien π × 25 cm². L'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]