{"id":2054,"date":"2026-04-30T18:45:19","date_gmt":"2026-04-30T18:45:19","guid":{"rendered":"https:\/\/mcqacademy.com\/zh\/mcq\/sum-of-first-natural-numbers\/"},"modified":"2026-04-30T18:45:19","modified_gmt":"2026-04-30T18:45:19","slug":"sum-of-first-natural-numbers","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/zh\/mcq\/sum-of-first-natural-numbers\/","title":{"rendered":"\u524d20\u4e2a\u81ea\u7136\u6570\u4e4b\u548c"},"content":{"rendered":"<p>\u8ba1\u7b97\u524d20\u4e2a\u81ea\u7136\u6570\u7684\u548c\u3002<\/p>\n\n<ul class=\"quiz-options wp-block-list\">\n<li>200<\/li>\n<li>210<\/li>\n<li>220<\/li>\n<li>190<\/li>\n<\/ul>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[964,1035,990,887],"subject":[123],"education_level":[3,4],"class_list":["post-2054","mcq","type-mcq","status-publish","hentry","topic-sequences","topic-summation","topic-arithmetic-series","topic-arithmetic-number-system","subject-mathematics","education_level-grade-8","education_level-ssc"],"mcq_note":"\u524dn\u4e2a\u81ea\u7136\u6570\u7684\u548c\u4e3a n(n+1)\/2\uff1b\u5f53 n=20 \u65f6\uff0c\u548c\u4e3a 20\u00d721\/2 = 210\u3002","mcq_options":[{"right":"no","answer":"200"},{"right":"yes","answer":"210"},{"right":"no","answer":"220"},{"right":"no","answer":"190"}],"multi_answers":"no","subject_terms":[{"id":123,"title":"Mathematics","slug":"mathematics"}],"topic_terms":[{"id":964,"title":"\u6570\u5217","slug":"sequences"},{"id":1035,"title":"\u6c42\u548c","slug":"summation"},{"id":990,"title":"\u7b49\u5dee\u6570\u5217","slug":"arithmetic-series"},{"id":887,"title":"\u7b97\u672f\u4e0e\u6570\u7cfb","slug":"arithmetic-number-system"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/mcq\/2054","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=2054"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/media?parent=2054"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/topic?post=2054"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/subject?post=2054"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/education_level?post=2054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}