Quiz : Mathématiques 7ème année – Arithmétique et Géométrie

Question 1 sur 10 10:00

[{"id":34483,"question":"Quel est le résultat de l'opération 12,5 × 4 ?","option_a":"48","option_b":"50","option_c":"52","option_d":"46","option_e":"","option_f":"","bonne_reponse":"B","explication":"12,5 × 4 = 50. Multiplier un nombre décimal par 4 revient à le doubler deux fois : 12,5 × 2 = 25, puis 25 × 2 = 50.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34484,"question":"Un rectangle a une longueur de 8 cm et une largeur de 5 cm. Son périmètre est de 26 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un rectangle se calcule par la formule P = 2 × (longueur + largeur). Ici, P = 2 × (8 + 5) = 26 cm. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34485,"question":"Quelle est la solution de l'équation 3x + 5 = 20 ?","option_a":"x = 5","option_b":"x = 4","option_c":"x = 6","option_d":"x = 3","option_e":"","option_f":"","bonne_reponse":"B","explication":"Pour résoudre 3x + 5 = 20, soustrayez 5 des deux côtés : 3x = 15, puis divisez par 3 : x = 5. La solution est x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34486,"question":"Le nombre 0,75 est équivalent à la fraction :","option_a":"3\/4","option_b":"7\/10","option_c":"1\/2","option_d":"5\/8","option_e":"","option_f":"","bonne_reponse":"A","explication":"0,75 = 75\/100 = 3\/4 après simplification par 25.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34487,"question":"L'aire d'un carré de côté 6 cm est de 36 cm².","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un carré se calcule par A = côté × côté. Ici, A = 6 × 6 = 36 cm². L'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34488,"question":"Quel est le résultat de 15 ÷ 0,5 ?","option_a":"7,5","option_b":"30","option_c":"15,5","option_d":"5","option_e":"","option_f":"","bonne_reponse":"B","explication":"Diviser par 0,5 revient à multiplier par 2. Donc 15 ÷ 0,5 = 15 × 2 = 30.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34489,"question":"Un triangle isocèle a deux côtés de même longueur. Vrai ou faux ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Par définition, un triangle isocèle a au moins deux côtés de même longueur. L'affirmation est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34490,"question":"Calculez 2\/3 + 1\/6 :","option_a":"5\/6","option_b":"4\/9","option_c":"3\/4","option_d":"1\/2","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour additionner 2\/3 et 1\/6, mettez au même dénominateur : 2\/3 = 4\/6. Donc 4\/6 + 1\/6 = 5\/6.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34491,"question":"Un cercle de rayon 3 cm a un diamètre de 6 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le diamètre d'un cercle est le double de son rayon. Ici, 3 cm × 2 = 6 cm. L'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":34492,"question":"Résolvez l'inéquation 2x - 3 \u003E 7 :","option_a":"x \u003E 5","option_b":"x \u003E 4","option_c":"x \u003C 5","option_d":"x \u003C 4","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour résoudre 2x - 3 \u003E 7, ajoutez 3 des deux côtés : 2x \u003E 10, puis divisez par 2 : x \u003E 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]