Quiz Maths 4ème Année : Algèbre, Géométrie & Probabilités

Question 1 sur 10 10:00

[{"id":49271,"question":"Quelle est la solution de l'équation x² - 5x + 6 = 0 ?","option_a":"x = 2 ou x = 3","option_b":"x = -2 ou x = -3","option_c":"x = 1 ou x = 6","option_d":"x = 0 ou x = 5","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'équation x² - 5x + 6 = 0 se factorise en (x-2)(x-3) = 0, donc les solutions sont x = 2 et x = 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49272,"question":"Dans un triangle rectangle, si l'hypoténuse mesure 10 cm et un côté mesure 6 cm, quelle est la longueur du troisième côté ?","option_a":"8 cm","option_b":"4 cm","option_c":"12 cm","option_d":"5 cm","option_e":"","option_f":"","bonne_reponse":"A","explication":"En appliquant le théorème de Pythagore : 10² = 6² + x² → x² = 100 - 36 = 64 → x = 8 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49273,"question":"La fonction f(x) = 3x + 2 est-elle une fonction linéaire ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Une fonction linéaire s'écrit f(x) = ax. Ici, f(x) = 3x + 2 est une fonction affine (car présence d'un terme constant).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49274,"question":"Quelle est la probabilité de tirer un as dans un jeu de 52 cartes ?","option_a":"1\/13","option_b":"1\/4","option_c":"1\/52","option_d":"4\/13","option_e":"","option_f":"","bonne_reponse":"A","explication":"Il y a 4 as dans un jeu de 52 cartes, donc la probabilité est 4\/52 = 1\/13.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49275,"question":"Le théorème de Thalès s'applique-t-il 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 Thalès s'applique à tous les triangles, à condition que les droites soient parallèles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49276,"question":"Quelle est la forme factorisée de l'expression x² - 9 ?","option_a":"(x-3)(x+3)","option_b":"(x-9)(x+1)","option_c":"(x-3)²","option_d":"(x+3)²","option_e":"","option_f":"","bonne_reponse":"A","explication":"x² - 9 est une différence de carrés, donc sa forme factorisée est (x-3)(x+3).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49277,"question":"Dans un sac contenant 3 boules rouges et 2 boules bleues, quelle est la probabilité de tirer une boule bleue ?","option_a":"2\/5","option_b":"3\/5","option_c":"1\/2","option_d":"1\/5","option_e":"","option_f":"","bonne_reponse":"A","explication":"Il y a 2 boules bleues sur un total de 5 boules, donc la probabilité est 2\/5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49278,"question":"La somme des angles d'un triangle est-elle toujours égale à 180° ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Dans un triangle, la somme des angles est toujours égale à 180°, qu'il soit rectangle, isocèle ou quelconque.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49279,"question":"Quelle est la solution de l'inéquation 2x - 5 \u003E 3 ?","option_a":"x \u003E 4","option_b":"x \u003C 4","option_c":"x \u003E 1","option_d":"x \u003C 1","option_e":"","option_f":"","bonne_reponse":"A","explication":"2x - 5 \u003E 3 → 2x \u003E 8 → x \u003E 4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":49280,"question":"Le volume d'une sphère de rayon r est donné par la formule V = (4\/3)πr³. Vrai ou faux ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La formule du volume d'une sphère est bien V = (4\/3)πr³.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]