{"id":227324,"date":"2023-08-17T17:09:22","date_gmt":"2023-08-17T09:09:22","guid":{"rendered":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/?p=227324"},"modified":"2023-10-12T14:08:08","modified_gmt":"2023-10-12T06:08:08","slug":"the-unsolvable-2019-psle-mathematics-question","status":"publish","type":"post","link":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/the-unsolvable-2019-psle-mathematics-question\/","title":{"rendered":"The &#8220;Unsolvable&#8221; 2019 PSLE Mathematics Question"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">By now, most readers would have read about the challenging mathematics question that caused a furore amongst worried parents.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In case you have not tried solving it, give it a go (or ask your child to)!<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"636\" src=\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-content\/uploads\/2023\/08\/unsolvable-img-1024x636.jpeg\" alt=\"PSLE Mathematics Question\" class=\"wp-image-227325\" srcset=\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-content\/uploads\/2023\/08\/unsolvable-img-980x608.jpeg 980w, https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-content\/uploads\/2023\/08\/unsolvable-img-480x298.jpeg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Why is this question difficult?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most commonly-cited reason is that the progression of the number of white triangles and grey triangles in the table do not appear to follow an easily discernible pattern.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check your answer by watching the video solution &#8211; we&#8217;ve presented two of them. The more efficient method requires imagination and visualisation while the other requires some understanding of basic arithmetic progression methods.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"2019 &quot;Unsolvable&quot; PSLE mathematics question\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/oZmSe2N8x3Y?feature=oembed\"  allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Here&#8217;s Ahsan (who&#8217;d just completed his PSLE at the time of recording) giving the question a go and explaining the solution in his own words.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"The &quot;Unsolvable&quot; 2019 PSLE Mathematics Question\" width=\"1080\" height=\"608\" src=\"https:\/\/www.youtube.com\/embed\/LRTghWkbFxw?feature=oembed\"  allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Click share and like if you found this lesson useful to encourage us to create more interesting lessons!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/contact-us\">Subscribe<\/a> to our newsletter to receive your regular dose of earth-shattering educational tips.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>By now, most readers would have read about the challenging mathematics question that caused a furore amongst worried parents. In case you have not tried solving it, give it a go (or ask your child to)! Why is this question difficult? The most commonly-cited reason is that the progression of the number of white triangles [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":227325,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[13,17],"tags":[],"class_list":["post-227324","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pri-maths","category-psle"],"_links":{"self":[{"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/posts\/227324","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/comments?post=227324"}],"version-history":[{"count":0,"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/posts\/227324\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/media\/227325"}],"wp:attachment":[{"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/media?parent=227324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/categories?post=227324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/glutenfreepleasure.com\/__proxy_domain\/www.joyouslearning.com.sg\/wp-json\/wp\/v2\/tags?post=227324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}