Quiz — cor devoir c 3.pdf

Question 1 sur 10 20:00

[{"id":8515,"question":"Quel est le résultat de l'opération 12,5 × 4 ?","option_a":"48","option_b":"50","option_c":"52","option_d":"46","option_e":"","option_f":"","bonne_reponse":"b","explication":"12,5 × 4 = 50. Multiplier un nombre décimal par 4 revient à le multiplier par 2 deux fois de suite.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"48\", \"b\": \"50\", \"c\": \"52\", \"d\": \"46\"}}","_debug_options_count":4},{"id":8516,"question":"La somme de deux fractions de même dénominateur s'obtient en additionnant les numérateurs.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai, mais uniquement si les dénominateurs sont identiques. Exemple : 3\/5 + 2\/5 = 5\/5.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":8517,"question":"Quel est le périmètre d'un rectangle de longueur 8 cm et de largeur 5 cm ?","option_a":"26 cm","option_b":"30 cm","option_c":"24 cm","option_d":"40 cm","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le périmètre d'un rectangle se calcule par la formule P = 2 × (longueur + largeur). Ici, P = 2 × (8 + 5) = 26 cm.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"26 cm\", \"b\": \"30 cm\", \"c\": \"24 cm\", \"d\": \"40 cm\"}}","_debug_options_count":4},{"id":8518,"question":"L'aire d'un triangle se calcule en multipliant la base par la hauteur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux. L'aire d'un triangle se calcule par la formule A = (base × hauteur) \/ 2.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":8519,"question":"Quel est le résultat de 3\/4 + 1\/2 ?","option_a":"4\/6","option_b":"5\/4","option_c":"2\/3","option_d":"1\/4","option_e":"","option_f":"","bonne_reponse":"b","explication":"Pour additionner 3\/4 et 1\/2, il faut d'abord les mettre au même dénominateur : 3\/4 + 2\/4 = 5\/4.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"4\/6\", \"b\": \"5\/4\", \"c\": \"2\/3\", \"d\": \"1\/4\"}}","_debug_options_count":4},{"id":8520,"question":"Un angle droit mesure exactement 90 degrés.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Un angle droit est défini comme un angle de 90 degrés.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":8521,"question":"Quel est le résultat de 15 ÷ 0,5 ?","option_a":"7,5","option_b":"30","option_c":"14,5","option_d":"5","option_e":"","option_f":"","bonne_reponse":"b","explication":"Diviser par 0,5 revient à multiplier par 2. Donc 15 ÷ 0,5 = 15 × 2 = 30.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"7,5\", \"b\": \"30\", \"c\": \"14,5\", \"d\": \"5\"}}","_debug_options_count":4},{"id":8522,"question":"La médiatrice d'un segment est une droite qui passe par le milieu du segment et qui est perpendiculaire à ce segment.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. La médiatrice d'un segment est définie comme une droite perpendiculaire au segment et passant par son milieu.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":8523,"question":"Quel est le résultat de (2 + 3) × 4 ?","option_a":"20","option_b":"14","option_c":"9","option_d":"18","option_e":"","option_f":"","bonne_reponse":"a","explication":"On applique d'abord la règle des parenthèses : (2 + 3) = 5, puis 5 × 4 = 20.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"20\", \"b\": \"14\", \"c\": \"9\", \"d\": \"18\"}}","_debug_options_count":4},{"id":8524,"question":"Un parallélogramme a ses côtés opposés parallèles et de même longueur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Par définition, un parallélogramme est un quadrilatère dont les côtés opposés sont parallèles et de même longueur.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]