Quiz : Maîtrisez les bases des mathématiques de collège !

Question 1 sur 10 10:00

[{"id":56511,"question":"Quelle est la valeur de l'expression 3 × (4 + 2) ?","option_a":"18","option_b":"14","option_c":"24","option_d":"9","option_e":"","option_f":"","bonne_reponse":"A","explication":"On applique d'abord la règle des parenthèses : 4 + 2 = 6, puis on multiplie par 3 : 3 × 6 = 18.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56512,"question":"Un triangle rectangle a un angle de 30°. Quel est la mesure du troisième angle ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La somme des angles d'un triangle est de 180°. Si deux angles sont 90° et 30°, le troisième est 180° - 90° - 30° = 60°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56513,"question":"Quelle est la formule de l'aire d'un rectangle ?","option_a":"Longueur × largeur","option_b":"Côté × côté","option_c":"Base × hauteur","option_d":"π × rayon²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule en multipliant sa longueur par sa largeur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56514,"question":"Si x + 5 = 12, alors x est égal à :","option_a":"7","option_b":"17","option_c":"-7","option_d":"5","option_e":"","option_f":"","bonne_reponse":"A","explication":"Pour trouver x, on soustrait 5 des deux côtés : x = 12 - 5 = 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56515,"question":"Un carré a un périmètre de 20 cm. Quelle est la longueur d'un côté ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un carré a 4 côtés égaux. Si le périmètre est 20 cm, chaque côté mesure 20 ÷ 4 = 5 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56516,"question":"Quelle est la solution de l'équation 2x - 3 = 7 ?","option_a":"5","option_b":"2","option_c":"10","option_d":"-5","option_e":"","option_f":"","bonne_reponse":"A","explication":"On ajoute 3 des deux côtés : 2x = 10, puis on divise par 2 : x = 5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56517,"question":"Le nombre 0,75 est égal à :","option_a":"3\/4","option_b":"1\/2","option_c":"2\/3","option_d":"4\/5","option_e":"","option_f":"","bonne_reponse":"A","explication":"0,75 = 75\/100 = 3\/4 après simplification.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56518,"question":"Un cercle a un rayon de 5 cm. Quelle est sa circonférence ? (π ≈ 3,14)","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"La circonférence d'un cercle est 2πr. Ici, 2 × 3,14 × 5 ≈ 31,4 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56519,"question":"Quelle est la valeur de 5² ?","option_a":"10","option_b":"25","option_c":"50","option_d":"15","option_e":"","option_f":"","bonne_reponse":"B","explication":"5² = 5 × 5 = 25.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":56520,"question":"Si un angle mesure 120°, alors son angle supplémentaire mesure :","option_a":"60°","option_b":"180°","option_c":"30°","option_d":"90°","option_e":"","option_f":"","bonne_reponse":"A","explication":"Deux angles sont supplémentaires si leur somme est 180°. Donc 180° - 120° = 60°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]