{"id":22766,"date":"2014-02-07T02:00:24","date_gmt":"2014-02-07T09:00:24","guid":{"rendered":"https:\/\/gmatclub.com\/blog\/?p=22766"},"modified":"2014-01-31T18:04:16","modified_gmt":"2014-02-01T01:04:16","slug":"gmat-question-of-the-day-feb-7-mixture-problem-and-critical-reasoning","status":"publish","type":"post","link":"https:\/\/gmatclub.com\/blog\/gmat-question-of-the-day-feb-7-mixture-problem-and-critical-reasoning\/","title":{"rendered":"GMAT Question of the Day (Feb 7): 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<div>\n<a href=\"https:\/\/gmatclub.com\/forum\/m03-80634.html\">Question Discussion &amp; Explanation<\/a><br \/>\n<strong>Correct Answer<\/strong> <span style=\"background-color:#fff;color:#fff\">- E -<\/span> (click and drag your mouse to see the answer)\n<\/div>\n<p><\/p>\n<div style=\"background-color: rgb(141, 179, 226); border-top: 4px solid rgb(0, 0, 0); border-bottom: 4px solid rgb(0, 0, 0); padding: 5px; margin-left: 20px; font-size: 15px; font-family: Gergia,serif; font-weight: bold\">\n<div style=\"font-size: 19px; color: rgb(255, 255, 255); margin-bottom: 10px; padding-left: 10px\">GMAT Daily Deals<\/div>\n<ul>\n<li style=\"padding: 0pt 0pt 10px 20px; color: rgb(255, 255, 255); list-style-type: disc\">e-GMAT\u2019s methods help non-natives improve on GMAT Verbal. $595 total savings @ GMAT Club. Learn more.<a href=\"https:\/\/gmatclub.com\/blog\/courses\/e-gmat-discount-coupon-code\/?fl=twitter\" style=\"color: rgb(0, 0, 255);\"> <u>Save $595 via GMAT Club!<\/u><\/a><\/li>\n<li style=\"padding: 0pt 0pt 10px 20px; color: rgb(255, 255, 255); list-style-type: disc\">Magoosh GMAT - GMAT Prep that's as smart as you are. Save $325 on Magoosh through GMAT Club.<a href=\"https:\/\/gmatclub.com\/blog\/courses\/magoosh-gmat-discount\/?fl=twitter\" style=\"color: rgb(0, 0, 255);\"> <u>Get up to $325 off!<\/u><\/a><\/li>\n<li style=\"padding: 0pt 0pt 10px 20px; color: rgb(255, 255, 255); list-style-type: disc\">Accepted Free On-Demand Webinar: 7 Steps to a Stronger MBA Application.<a href=\"https:\/\/gmatclub.com\/blog\/2013\/04\/free-webinar-available-on-demand-teaching-essential-mba-pre-application-steps\/\" style=\"color: rgb(0, 0, 255);\"> <u>Free Webinar Available!<\/u><\/a><\/li>\n<li style=\"padding: 0pt 0pt 0px 20px; color: rgb(255, 255, 255); list-style-type: disc\">Check out our discounts that are only offered through GMAT Club.<a href=\"https:\/\/gmatclub.com\/blog\/courses\/admissionado-discount\/?fl=twitter\" style=\"color: rgb(0, 0, 255);\"> <u>Learn more!<\/u><\/a><\/li>\n<\/ul>\n<\/div>\n<p><\/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.<\/p>\n<p>Which 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<div>\n<a href=\"https:\/\/gmatclub.com\/forum\/damaged-nerves-in-the-spinal-cord-do-not-regenerate-76764.html\">Question Discussion &amp; Explanation<\/a><br \/>\n<strong>Correct Answer<\/strong> <span style=\"background-color:#fff;color:#fff\">- A -<\/span> (click and drag your mouse to see the answer)\n<\/div>\n<p><\/p>\n<p><strong>Like these questions?<\/strong> Get the GMAT Club question collection: <a href=\"https:\/\/gmatclub.com\/tests\/\">online at GMAT Club<\/a> OR <a href=\"https:\/\/www.amazon.com\/gp\/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fgp%2Fentity%2FGMAT-Club%2FB0048PPF3U%3Fie%3DUTF8%26ref_%3Dntt_athr_dp_pel_1&tag=gmatclub-20&linkCode=ur2&camp=1789&creative=390957\">on your Kindle<\/a> OR <a href=\"https:\/\/click.linksynergy.com\/fs-bin\/stat?id=PJTlq5NYqfE&offerid=146261&type=3&subid=blog&tmpid=1826&RD_PARM1=http%253A%252F%252Fitunes.apple.com%252Fus%252Fapp%252Fgmat-toolkit%252Fid328345537%253Fmt%253D8%2526uo%253D6%2526partnerId%253D30\">on your iPhone\/iPad<\/a><\/p>\n<p><a href=\"https:\/\/gmatclub.com\/blog\/category\/blog\/gmat-tests\/\"><strong>Browse all GMAT Questions of the Day<\/strong><\/a><\/p>\n<p><strong>Subscribe to GMAT Question of the Day:<\/strong> <a href=\"https:\/\/feedburner.google.com\/fb\/a\/mailverify?uri=GMAT-Question-of-the-day&amp;loc=en_US\">E-mail<\/a> | <a href=\"https:\/\/feeds.feedburner.com\/GMAT-Question-of-the-day\">RSS<\/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":146,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152,9,721,717],"tags":[],"class_list":["post-22766","post","type-post","status-publish","format-standard","hentry","category-gmat-tests","category-gmat","category-critical-reasoning-gmat","category-problem-solving-gmat","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/22766","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\/146"}],"replies":[{"embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/comments?post=22766"}],"version-history":[{"count":4,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/22766\/revisions"}],"predecessor-version":[{"id":22769,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/posts\/22766\/revisions\/22769"}],"wp:attachment":[{"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/media?parent=22766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/categories?post=22766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gmatclub.com\/blog\/wp-json\/wp\/v2\/tags?post=22766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}