Quiz Maths 8ème : Équations, Géométrie et Fractions

Question 1 sur 10 10:00

[{"id":17068,"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":"3x - 5 = 10 ⇒ 3x = 15 ⇒ x = 5. La solution est donc x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17069,"question":"Le théorème de Pythagore s'applique uniquement aux triangles isocèles.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le théorème de Pythagore s'applique à tous les triangles rectangles, pas uniquement aux triangles isocèles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17070,"question":"Quelle est la valeur de 2³ + 4² ?","option_a":"16","option_b":"24","option_c":"20","option_d":"18","option_e":"","option_f":"","bonne_reponse":"C","explication":"2³ = 8 et 4² = 16. Donc 8 + 16 = 24.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17071,"question":"Un carré a une aire de 36 cm². Quelle est la longueur de son côté ?","option_a":"6 cm","option_b":"9 cm","option_c":"12 cm","option_d":"4 cm","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un carré est donnée par côté². Donc côté = √36 = 6 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17072,"question":"La fraction 3\/4 est équivalente à 0,75.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"3\/4 = 0,75. La fraction est donc équivalente au nombre décimal 0,75.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17073,"question":"Quelle est la solution de l'inéquation 2x + 3 \u003E 7 ?","option_a":"x \u003E 2","option_b":"x \u003C 2","option_c":"x \u003E 4","option_d":"x \u003C 4","option_e":"","option_f":"","bonne_reponse":"A","explication":"2x + 3 \u003E 7 ⇒ 2x \u003E 4 ⇒ x \u003E 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17074,"question":"Un parallélogramme a des diagonales de même longueur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Seuls les rectangles et les carrés (cas particuliers de parallélogrammes) ont des diagonales de même longueur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17075,"question":"Quelle est la valeur de (5\/2) × (4\/3) ?","option_a":"10\/6","option_b":"20\/6","option_c":"10\/3","option_d":"5\/6","option_e":"","option_f":"","bonne_reponse":"C","explication":"(5\/2) × (4\/3) = (5×4)\/(2×3) = 20\/6 = 10\/3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17076,"question":"Le volume d'un cube de côté 3 cm est de 27 cm³.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Volume = côté³ = 3³ = 27 cm³. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":17077,"question":"Quelle est la médiane d'une série de nombres : 2, 4, 6, 8, 10 ?","option_a":"4","option_b":"6","option_c":"8","option_d":"5","option_e":"","option_f":"","bonne_reponse":"B","explication":"La médiane est la valeur centrale de la série ordonnée. Ici, c'est 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]