Mathématiques 7ème année : Équations, Géométrie et Nombres

Question 1 sur 10 10:00

[{"id":72682,"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 = 7","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 3x + 5 = 20, soustrais 5 des deux côtés : 3x = 15, puis divise par 3 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72683,"question":"Le périmètre d'un carré de côté 4 cm est de 16 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un carré se calcule par 4 × côté. Ici, 4 × 4 = 16 cm, donc c'est vrai.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72684,"question":"Quel est le résultat de 12,5 × 0,4 ?","option_a":"5","option_b":"50","option_c":"0,5","option_d":"500","option_e":"","option_f":"","bonne_reponse":"A","explication":"12,5 × 0,4 = (12,5 × 4) \/ 10 = 50 \/ 10 = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72685,"question":"L'aire d'un rectangle de longueur 8 cm et de largeur 3 cm est de 24 cm².","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule par longueur × largeur. Ici, 8 × 3 = 24 cm², donc c'est vrai.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72686,"question":"Quelle est la solution de l'équation 2x - 7 = 11 ?","option_a":"x = 9","option_b":"x = 4","option_c":"x = 18","option_d":"x = 7","option_e":"","option_f":"","bonne_reponse":"B","explication":"Pour résoudre 2x - 7 = 11, ajoute 7 des deux côtés : 2x = 18, puis divise par 2 : x = 9.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72687,"question":"Le nombre 0,75 est égal à 3\/4.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"0,75 = 75\/100 = 3\/4, donc c'est vrai.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72688,"question":"Quel est le résultat de 15 - 8,5 + 3,2 ?","option_a":"9,7","option_b":"10,7","option_c":"9,3","option_d":"10,3","option_e":"","option_f":"","bonne_reponse":"A","explication":"15 - 8,5 = 6,5, puis 6,5 + 3,2 = 9,7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72689,"question":"L'équation 5x = 0 a pour solution x = 1.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Si 5x = 0, alors x = 0, car tout nombre multiplié par 0 donne 0.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72690,"question":"Quel est le périmètre d'un triangle équilatéral de côté 6 cm ?","option_a":"12 cm","option_b":"18 cm","option_c":"6 cm","option_d":"24 cm","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un triangle équilatéral a trois côtés égaux. Le périmètre est donc 3 × 6 = 18 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":72691,"question":"Le nombre 1,25 est supérieur à 1,3.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"1,25 est inférieur à 1,3, car 1,25 \u003C 1,30.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]