Quiz Mathématiques — 8ème année : Algèbre et Géométrie

Question 1 sur 10 10:00

[{"id":46196,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = 4","option_d":"x = 10","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":46197,"question":"Un triangle isocèle a toujours deux angles égaux.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Par définition, un triangle isocèle a deux côtés égaux, ce qui implique que les angles opposés à ces côtés sont égaux.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46198,"question":"Quelle est la valeur de 2³ × 2² ?","option_a":"2⁵ = 32","option_b":"2⁶ = 64","option_c":"4⁵ = 1024","option_d":"2⁴ = 16","option_e":"","option_f":"","bonne_reponse":"A","explication":"En utilisant la propriété des puissances : 2³ × 2² = 2^(3+2) = 2⁵ = 32.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46199,"question":"L'aire d'un rectangle de longueur 8 cm et de largeur 5 cm est de :","option_a":"40 cm²","option_b":"13 cm²","option_c":"30 cm²","option_d":"26 cm²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule avec la formule : longueur × largeur = 8 × 5 = 40 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46200,"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 internes d'un triangle est toujours de 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46201,"question":"Quelle est la solution de l'inéquation 2x - 7 \u003C 11 ?","option_a":"x \u003C 9","option_b":"x \u003E 9","option_c":"x \u003C 18","option_d":"x \u003E 18","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 2x - 7 \u003C 11, ajoutez 7 des deux côtés : 2x \u003C 18, puis divisez par 2 : x \u003C 9.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46202,"question":"Le volume d'un cube de côté 4 cm est de :","option_a":"64 cm³","option_b":"16 cm³","option_c":"48 cm³","option_d":"32 cm³","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le volume d'un cube se calcule avec la formule : côté³ = 4³ = 64 cm³.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46203,"question":"Un angle plat mesure toujours 180°.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un angle plat est un angle dont les côtés sont dans le prolongement l'un de l'autre, ce qui correspond à 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46204,"question":"Quelle est la valeur de x dans l'équation 5(x - 2) = 25 ?","option_a":"x = 7","option_b":"x = 5","option_c":"x = 3","option_d":"x = 10","option_e":"","option_f":"","bonne_reponse":"A","explication":"Développez d'abord : 5x - 10 = 25. Ajoutez 10 : 5x = 35. Divisez par 5 : x = 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":46205,"question":"L'aire d'un triangle de base 6 cm et de hauteur 4 cm est de :","option_a":"12 cm²","option_b":"24 cm²","option_c":"10 cm²","option_d":"8 cm²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un triangle se calcule avec la formule : (base × hauteur) \/ 2 = (6 × 4) \/ 2 = 12 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]