Quiz Mathématiques — 7ème année : Nombres et Géométrie

Question 1 sur 10 10:00

[{"id":13343,"question":"Quel est le résultat de 45 × 12 ?","option_a":"480","option_b":"540","option_c":"560","option_d":"600","option_e":"","option_f":"","bonne_reponse":"B","explication":"45 × 12 = (40 × 12) + (5 × 12) = 480 + 60 = 540. Cette méthode utilise la distributivité de la multiplication.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13344,"question":"Un angle de 90° est appelé :","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un angle de 90° est effectivement appelé angle droit, c'est une définition fondamentale en géométrie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13345,"question":"Quelle est la fraction irréductible équivalente à 18\/24 ?","option_a":"3\/4","option_b":"6\/8","option_c":"9\/12","option_d":"2\/3","option_e":"","option_f":"","bonne_reponse":"A","explication":"18\/24 se simplifie en divisant numérateur et dénominateur par 6 : (18÷6)\/(24÷6) = 3\/4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13346,"question":"Le périmètre d'un carré de côté 5 cm est :","option_a":"10 cm","option_b":"15 cm","option_c":"20 cm","option_d":"25 cm","option_e":"","option_f":"","bonne_reponse":"C","explication":"Le périmètre d'un carré se calcule par P = 4 × côté = 4 × 5 = 20 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13347,"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 euclidienne : la somme des angles internes d'un triangle est toujours 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13348,"question":"Quel est le PGCD de 36 et 48 ?","option_a":"6","option_b":"12","option_c":"18","option_d":"24","option_e":"","option_f":"","bonne_reponse":"B","explication":"Les diviseurs de 36 sont : 1, 2, 3, 4, 6, 9, 12, 18, 36. Ceux de 48 : 1, 2, 3, 4, 6, 8, 12, 16, 24, 48. Le plus grand commun est 12.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13349,"question":"Un rectangle a une longueur de 8 cm et une largeur de 3 cm. Son aire est :","option_a":"11 cm²","option_b":"22 cm²","option_c":"24 cm²","option_d":"32 cm²","option_e":"","option_f":"","bonne_reponse":"C","explication":"L'aire d'un rectangle se calcule par A = longueur × largeur = 8 × 3 = 24 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13350,"question":"Le nombre 0,75 est égal à :","option_a":"3\/4","option_b":"1\/2","option_c":"2\/3","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":13351,"question":"Un angle de 180° est appelé angle plat.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Un angle de 180° est bien appelé angle plat, car il forme une ligne droite.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":13352,"question":"Quel est le résultat de 3\/4 + 1\/2 ?","option_a":"4\/6","option_b":"5\/4","option_c":"3\/2","option_d":"7\/8","option_e":"","option_f":"","bonne_reponse":"B","explication":"3\/4 + 1\/2 = 3\/4 + 2\/4 = 5\/4 après mise au même dénominateur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]