{"id":2340,"date":"2010-02-12T03:00:50","date_gmt":"2010-02-12T11:00:50","guid":{"rendered":"https:\/\/gmatclub.com\/blog\/?p=2340"},"modified":"2010-02-12T02:59:24","modified_gmt":"2010-02-12T10:59:24","slug":"gmat-question-of-the-day-feb-12-mixture-problem-and-critical-reasoning","status":"publish","type":"post","link":"https:\/\/gmatclub.com\/blog\/gmat-question-of-the-day-feb-12-mixture-problem-and-critical-reasoning\/","title":{"rendered":"GMAT Question of the Day (Feb 12): Mixture Problem and Critical Reasoning"},"content":{"rendered":"<p><strong>Math (PS)<\/strong><\/p>\n<p>If a portion of a half water\/half alcohol mix is replaced with 25% alcohol solution, resulting in a 30% alcohol solution, what percentage of the original alcohol was replaced?<\/p>\n<p>(A) 3%<br \/>\n(B) 20%<br \/>\n(C) 66%<br \/>\n(D) 75%<br \/>\n(E) 80%<\/p>\n<p><a href=\"https:\/\/gmatclub.com\/forum\/m03-80634.html\">OA and Explanation<\/a><\/p>\n<p><strong>Verbal (CR)<\/strong><\/p>\n<p>Damaged nerves in the spinal cord do not regenerate themselves naturally, nor even under the spur of nerve-growth stimulants. The reason, recently discovered, is the presence of nerve-growth inhibitors in the spinal cord. Antibodies that deactivate those inhibitors have now been developed. Clearly, then, nerve repair will be a standard medical procedure in the foreseeable future.<br \/>\nWhich of the following, if true, casts the most serious doubt on the accuracy of the prediction above?<\/p>\n<p>(A) Prevention of the regeneration of damaged nerves is merely a by-product of the main function in the human body of the substances inhibiting nerve growth.<br \/>\n(B) Certain nerve-growth stimulants have similar chemical structures to those of the antibodies against nerve-growth inhibitors.<br \/>\n(C) Nerves in the brain are similar to nerves in the spinal cord in their inability to regenerate themselves naturally.<br \/>\n(D) Researchers have been able to stimulate the growth of nerves not located in the spinal cord by using only nerve-growth stimulants.<br \/>\n(E) Deactivating the substances inhibiting nerve growth for an extended period would require a steady supply of antibodies.<\/p>\n<p><a href=\"https:\/\/gmatclub.com\/forum\/cr-damaged-nerves-76764.html\">OA and Explanation<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Math (PS) If a portion of a half water\/half alcohol mix is replaced with 25% alcohol solution, resulting in a 30% alcohol solution, what percentage of the original alcohol was&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152],"tags":[],"class_list":["post-2340","post","type-post","status-publish","format-standard","hentry","category-gmat-tests","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/2340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/comments?post=2340"}],"version-history":[{"count":2,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/2340\/revisions"}],"predecessor-version":[{"id":2342,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/2340\/revisions\/2342"}],"wp:attachment":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/media?parent=2340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/categories?post=2340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/tags?post=2340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}