Quiz interactif : Mathématiques 7ème année — Nombres et géométrie

Question 1 sur 10 10:00

[{"id":32048,"question":"Quel est le résultat de 456 × 23 ?","option_a":"10 488","option_b":"10 478","option_c":"10 588","option_d":"10 498","option_e":"","option_f":"","bonne_reponse":"A","explication":"456 × 23 = 456 × (20 + 3) = (456 × 20) + (456 × 3) = 9 120 + 1 368 = 10 488.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32049,"question":"Le périmètre d'un carré de côté 5 cm est de 20 cm.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le périmètre d'un carré se calcule par 4 × côté. Donc 4 × 5 = 20 cm. L'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32050,"question":"Quelle est l'aire d'un rectangle de longueur 8 cm et de largeur 5 cm ?","option_a":"40 cm²","option_b":"35 cm²","option_c":"45 cm²","option_d":"30 cm²","option_e":"","option_f":"","bonne_reponse":"A","explication":"L'aire d'un rectangle se calcule par longueur × largeur. Donc 8 × 5 = 40 cm².","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32051,"question":"Convertir 3,5 km en mètres.","option_a":"350 m","option_b":"3 500 m","option_c":"35 m","option_d":"35 000 m","option_e":"","option_f":"","bonne_reponse":"B","explication":"1 km = 1 000 m, donc 3,5 km = 3,5 × 1 000 = 3 500 m.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32052,"question":"Un triangle rectangle a des côtés de 3 cm et 4 cm. Quelle est la longueur de l'hypoténuse ?","option_a":"5 cm","option_b":"6 cm","option_c":"7 cm","option_d":"8 cm","option_e":"","option_f":"","bonne_reponse":"A","explication":"D'après le théorème de Pythagore : hypoténuse² = 3² + 4² = 9 + 16 = 25. Donc hypoténuse = √25 = 5 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32053,"question":"Le volume d'un cube de côté 3 cm est de 27 cm³.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"A","explication":"Le volume d'un cube se calcule par côté³. Donc 3³ = 27 cm³. L'affirmation est vraie.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32054,"question":"Quel est le résultat de 1 200 ÷ 25 ?","option_a":"48","option_b":"40","option_c":"52","option_d":"60","option_e":"","option_f":"","bonne_reponse":"A","explication":"1 200 ÷ 25 = (1 200 ÷ 5) ÷ 5 = 240 ÷ 5 = 48.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32055,"question":"Un angle de 90° est appelé angle obtus.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"B","explication":"Un angle de 90° est un angle droit. Un angle obtus mesure entre 90° et 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32056,"question":"Quelle est la somme des angles d'un triangle ?","option_a":"180°","option_b":"90°","option_c":"360°","option_d":"270°","option_e":"","option_f":"","bonne_reponse":"A","explication":"La somme des angles d'un triangle est toujours égale à 180°.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0},{"id":32057,"question":"Convertir 2,75 heures en minutes.","option_a":"165 minutes","option_b":"150 minutes","option_c":"180 minutes","option_d":"120 minutes","option_e":"","option_f":"","bonne_reponse":"A","explication":"1 heure = 60 minutes, donc 2,75 heures = 2 × 60 + 0,75 × 60 = 120 + 45 = 165 minutes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0}]