{"id":16982,"date":"2026-05-02T01:15:53","date_gmt":"2026-05-01T19:15:53","guid":{"rendered":"https:\/\/mcqacademy.com\/en\/mcq\/euler-totient-basic-arithmetic-9\/"},"modified":"2026-05-02T01:15:53","modified_gmt":"2026-05-01T19:15:53","slug":"euler-totient-basic-arithmetic-9","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/en\/mcq\/euler-totient-basic-arithmetic-9\/","title":{"rendered":"Euler Totient Basic Arithmetic 9"},"content":{"rendered":"<p>How many positive integers not exceeding 90 are relatively prime to 90?<\/p>\n\n<ul class=\"quiz-options wp-block-list\">\n<li>24<\/li>\n<li>66<\/li>\n<li>22<\/li>\n<li>45<\/li>\n<li>26<\/li>\n<\/ul>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[2489,2665,2522],"subject":[1425],"education_level":[1896],"class_list":["post-16982","mcq","type-mcq","status-publish","hentry","topic-arithmetic-number-system","topic-coprime-numbers","topic-number-theory","subject-mathematics","education_level-hsc"],"mcq_note":"This is Euler's totient value \u03c6(90). Removing multiples of its prime factors gives \u03c6(90) = 24.","mcq_options":[{"right":"yes","answer":"24"},{"right":"no","answer":"66"},{"right":"no","answer":"22"},{"right":"no","answer":"45"},{"right":"no","answer":"26"}],"multi_answers":"no","subject_terms":[{"id":1425,"title":"Mathematics","slug":"mathematics"}],"topic_terms":[{"id":2489,"title":"Arithmetic &amp; Number System","slug":"arithmetic-number-system"},{"id":2665,"title":"Coprime Numbers","slug":"coprime-numbers"},{"id":2522,"title":"Number Theory","slug":"number-theory"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq\/16982","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq"}],"about":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/types\/mcq"}],"author":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/comments?post=16982"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/media?parent=16982"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/topic?post=16982"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/subject?post=16982"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/education_level?post=16982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}