Quiz : Mathématiques 7ème année — Exercices et Logique

Question 1 sur 10 10:00

[{"id":41526,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 15","option_c":"x = 8,33","option_d":"x = 7","option_e":"","option_f":"","bonne_reponse":"A","explication":"Soustraire 5 des deux côtés donne 3x = 15, puis diviser par 3 donne x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41527,"question":"Un rectangle a une longueur de 8 cm et une largeur de 5 cm. Quel est son périmètre ?","option_a":"13 cm","option_b":"26 cm","option_c":"40 cm","option_d":"30 cm","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le périmètre d'un rectangle est 2 × (longueur + largeur) = 2 × (8 + 5) = 26 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41528,"question":"Vrai ou Faux : Le carré est un losange particulier.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un carré a tous ses côtés égaux et tous ses angles droits, ce qui en fait un cas particulier de losange.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41529,"question":"Quelle est la valeur de l'expression 2 × (7 - 3) + 4 ?","option_a":"12","option_b":"14","option_c":"16","option_d":"10","option_e":"","option_f":"","bonne_reponse":"C","explication":"Calculer d'abord la parenthèse : 7 - 3 = 4, puis multiplier par 2 : 2 × 4 = 8, et enfin ajouter 4 : 8 + 4 = 12.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41530,"question":"Vrai ou Faux : 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 plane : la somme des angles internes d'un triangle est toujours 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41531,"question":"Quel est le résultat de 0,75 × 8 ?","option_a":"6","option_b":"5,6","option_c":"6,4","option_d":"5,2","option_e":"","option_f":"","bonne_reponse":"A","explication":"0,75 × 8 = (3\/4) × 8 = 6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41532,"question":"Vrai ou Faux : Un parallélogramme a ses diagonales qui se coupent en leur milieu.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"C'est une propriété caractéristique du parallélogramme : ses diagonales se bisectent mutuellement.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41533,"question":"Quelle est l'aire d'un carré de côté 4 cm ?","option_a":"8 cm²","option_b":"12 cm²","option_c":"16 cm²","option_d":"20 cm²","option_e":"","option_f":"","bonne_reponse":"C","explication":"L'aire d'un carré est côté × côté = 4 × 4 = 16 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41534,"question":"Vrai ou Faux : 5 est un nombre premier.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un nombre premier n'a que deux diviseurs : 1 et lui-même. 5 ne se divise que par 1 et 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":41535,"question":"Quel est le résultat de 15 ÷ 0,5 ?","option_a":"7,5","option_b":"30","option_c":"5","option_d":"10","option_e":"","option_f":"","bonne_reponse":"B","explication":"Diviser par 0,5 revient à multiplier par 2 : 15 ÷ 0,5 = 15 × 2 = 30.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]