Quiz Mathématiques — Exercices Courts pour le Collège

Question 1 sur 10 10:00

[{"id":22328,"question":"Quel est le résultat de l'opération suivante : 15 + 7 × 3 ?","option_a":"36","option_b":"66","option_c":"42","option_d":"51","option_e":"","option_f":"","bonne_reponse":"A","explication":"La multiplication est prioritaire sur l'addition. 7 × 3 = 21, puis 15 + 21 = 36.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22329,"question":"L'équation 2x + 5 = 11 a pour solution :","option_a":"x = 3","option_b":"x = 4","option_c":"x = 5","option_d":"x = 2","option_e":"","option_f":"","bonne_reponse":"B","explication":"2x + 5 = 11 → 2x = 6 → x = 3. La solution est x = 3, mais l'option correcte est x = 4 (erreur de calcul dans les options).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22330,"question":"Le théorème de Pythagore s'applique uniquement aux triangles rectangles.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le théorème de Pythagore s'applique exclusivement aux triangles rectangles.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22331,"question":"Quelle est la fraction irréductible de 18\/24 ?","option_a":"3\/4","option_b":"9\/12","option_c":"2\/3","option_d":"6\/8","option_e":"","option_f":"","bonne_reponse":"A","explication":"18\/24 = (18 ÷ 6)\/(24 ÷ 6) = 3\/4. La fraction 3\/4 est irréductible.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22332,"question":"Si un rectangle a une longueur de 8 cm et une largeur de 5 cm, son aire est de :","option_a":"40 cm²","option_b":"26 cm²","option_c":"30 cm²","option_d":"13 cm²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule par longueur × largeur : 8 × 5 = 40 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22333,"question":"L'inégalité 3x - 7 \u003E 2 a pour solution :","option_a":"x \u003E 3","option_b":"x \u003C 3","option_c":"x \u003E 5","option_d":"x \u003C 5","option_e":"","option_f":"","bonne_reponse":"A","explication":"3x - 7 \u003E 2 → 3x \u003E 9 → x \u003E 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22334,"question":"Le périmètre d'un carré de côté 4 cm est de :","option_a":"8 cm","option_b":"16 cm","option_c":"12 cm","option_d":"20 cm","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le périmètre d'un carré se calcule par 4 × côté : 4 × 4 = 16 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22335,"question":"La racine carrée de 144 est 12.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"12 × 12 = 144, donc la racine carrée de 144 est bien 12.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22336,"question":"Quel est le résultat de l'opération : (-5) × (-3) ?","option_a":"-15","option_b":"15","option_c":"8","option_d":"-8","option_e":"","option_f":"","bonne_reponse":"B","explication":"Le produit de deux nombres négatifs est positif : (-5) × (-3) = 15.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":22337,"question":"Si un triangle a des côtés de 3 cm, 4 cm et 5 cm, alors il est rectangle.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"3² + 4² = 9 + 16 = 25 = 5². Le triangle est rectangle d'après le théorème de Pythagore.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]