Quiz Mathématiques — 7ème année : Testez vos bases !

Question 1 sur 10 10:00

[{"id":15828,"question":"Quel est le résultat de l’opération suivante : 12 × (8 – 5) + 7 ?","option_a":"55","option_b":"67","option_c":"43","option_d":"77","option_e":"","option_f":"","bonne_reponse":"B","explication":"On applique d’abord la soustraction entre parenthèses (8 – 5 = 3), puis la multiplication (12 × 3 = 36), et enfin l’addition (36 + 7 = 43).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15829,"question":"Vrai ou Faux : La somme de deux nombres négatifs est toujours négative.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Exemple : (-3) + (-2) = -5 (négatif). La règle est toujours vraie pour les nombres négatifs.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15830,"question":"Quel est le périmètre d’un rectangle de longueur 10 cm et de largeur 4 cm ?","option_a":"28 cm","option_b":"40 cm","option_c":"14 cm","option_d":"24 cm","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d’un rectangle se calcule avec la formule : P = 2 × (Longueur + Largeur) = 2 × (10 + 4) = 28 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15831,"question":"Vrai ou Faux : 3\/4 est supérieur à 5\/6.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Pour comparer 3\/4 et 5\/6, on les met au même dénominateur : 3\/4 = 9\/12 et 5\/6 = 10\/12. 10\/12 \u003E 9\/12, donc 5\/6 \u003E 3\/4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15832,"question":"Quel est le résultat de 45 ÷ 9 + 3 × 2 ?","option_a":"7","option_b":"11","option_c":"13","option_d":"9","option_e":"","option_f":"","bonne_reponse":"C","explication":"On effectue d’abord la division (45 ÷ 9 = 5) et la multiplication (3 × 2 = 6), puis l’addition (5 + 6 = 11). Attention à l’ordre des opérations !","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15833,"question":"Vrai ou Faux : Un angle droit mesure 90 degrés.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Par définition, un angle droit mesure exactement 90 degrés.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15834,"question":"Quel est le résultat de 25% de 80 ?","option_a":"15","option_b":"20","option_c":"25","option_d":"30","option_e":"","option_f":"","bonne_reponse":"B","explication":"25% de 80 se calcule avec : (25\/100) × 80 = 0,25 × 80 = 20.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15835,"question":"Vrai ou Faux : Le nombre 0 est un nombre premier.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un nombre premier est un nombre supérieur à 1 qui n’a que deux diviseurs : 1 et lui-même. 0 n’est pas premier.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15836,"question":"Quel est le volume d’un cube de côté 3 cm ?","option_a":"9 cm³","option_b":"12 cm³","option_c":"27 cm³","option_d":"36 cm³","option_e":"","option_f":"","bonne_reponse":"C","explication":"Le volume d’un cube se calcule avec la formule : V = côté³ = 3³ = 27 cm³.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":15837,"question":"Vrai ou Faux : La racine carrée de 16 est 4.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"La racine carrée de 16 est bien 4, car 4 × 4 = 16. La réponse est donc vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]