{"id":1957,"date":"2026-04-29T14:11:56","date_gmt":"2026-04-29T14:11:56","guid":{"rendered":"https:\/\/mcqacademy.com\/zh\/mcq\/sum-of-first-15-natural-numbers\/"},"modified":"2026-04-29T14:11:56","modified_gmt":"2026-04-29T14:11:56","slug":"sum-of-first-15-natural-numbers","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/zh\/mcq\/sum-of-first-15-natural-numbers\/","title":{"rendered":"\u524d15\u4e2a\u81ea\u7136\u6570\u4e4b\u548c"},"content":{"rendered":"<p>\u6c42\u524d 15 \u4e2a\u81ea\u7136\u6570\u7684\u548c\u3002<\/p>\n\n<ul class=\"quiz-options wp-block-list\">\n<li>105<\/li>\n<li>120<\/li>\n<li>135<\/li>\n<li>150<\/li>\n<\/ul>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[1007,1013,887],"subject":[123],"education_level":[3,4],"class_list":["post-1957","mcq","type-mcq","status-publish","hentry","topic-sequences-and-series","topic-arithmetic-progression","topic-arithmetic-number-system","subject-mathematics","education_level-grade-8","education_level-ssc"],"mcq_note":"\u524d n \u4e2a\u81ea\u7136\u6570\u4e4b\u548c = n(n+1)\/2\u3002\u4ee3\u5165 n = 15\uff1a15\u00d716\/2 = 120\uff0c\u6240\u4ee5\u548c\u4e3a 120\u3002","mcq_options":[{"right":"no","answer":"105"},{"right":"yes","answer":"120"},{"right":"no","answer":"135"},{"right":"no","answer":"150"}],"multi_answers":"no","subject_terms":[{"id":123,"title":"Mathematics","slug":"mathematics"}],"topic_terms":[{"id":1007,"title":"\u6570\u5217\u4e0e\u7ea7\u6570","slug":"sequences-and-series"},{"id":1013,"title":"\u7b49\u5dee\u6570\u5217","slug":"arithmetic-progression"},{"id":887,"title":"\u7b97\u672f\u4e0e\u6570\u7cfb","slug":"arithmetic-number-system"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/mcq\/1957","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/mcq"}],"about":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/types\/mcq"}],"author":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/comments?post=1957"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/media?parent=1957"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/topic?post=1957"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/subject?post=1957"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/education_level?post=1957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}