{"id":7283,"date":"2026-06-25T09:37:18","date_gmt":"2026-06-25T09:37:18","guid":{"rendered":"https:\/\/themindpalace.in\/?p=7283"},"modified":"2026-06-25T09:37:20","modified_gmt":"2026-06-25T09:37:20","slug":"daily-math-hack-master-percentages-in-seconds","status":"publish","type":"post","link":"https:\/\/themindpalace.in\/index.php\/2026\/06\/25\/daily-math-hack-master-percentages-in-seconds\/","title":{"rendered":"Daily Math Hack: Master Percentages in Seconds"},"content":{"rendered":"<figure class=\"wp-block-embed wp-block-embed-youtube is-type-video is-provider-youtube epyt-figure\"><div class=\"wp-block-embed__wrapper\"><div class=\"epyt-video-wrapper\"><iframe loading=\"lazy\"  id=\"_ytid_63685\"  width=\"480\" height=\"270\"  data-origwidth=\"480\" data-origheight=\"270\" src=\"https:\/\/www.youtube.com\/embed\/mibzuMVMMwU?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;rel=1&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;disablekb=0&#038;\" class=\"__youtube_prefs__  no-lazyload\" title=\"YouTube player\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe><\/div><\/div><\/figure>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">The Secret to Speed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In competitive exams like SSC, Banking, or Railways, every second counts. Calculating percentages the traditional way ($40\/100 \\times 70$) consumes precious time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The Golden Rule:<\/strong> When both numbers end in a zero, simply multiply the first digits of each number.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Examples:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>40% of 70:<\/strong> 4 x 7 =<strong> 28<\/strong><\/li>\n\n\n\n<li><strong>60% of 80:<\/strong> 6 x 8 = <strong>48<\/strong><\/li>\n\n\n\n<li><strong>30% of 20:<\/strong> 3 x 2 = <strong>6<\/strong><\/li>\n\n\n\n<li><strong>90% of 50:<\/strong> 9 x 5 = <strong>45<\/strong><\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Note:<\/strong> This trick is a massive time-saver for <strong>Data Interpretation<\/strong> questions where you need to compare values quickly without full calculation.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Practice Zone<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Test your speed! Can you solve these in under 5 seconds?<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"1\">\n<li>What is <strong>20% of 40<\/strong>?<\/li>\n\n\n\n<li>What is <strong>50% of 60<\/strong>?<\/li>\n\n\n\n<li>What is <strong>70% of 90<\/strong>?<\/li>\n\n\n\n<li>What is <strong>80% of 30<\/strong>?<\/li>\n\n\n\n<li>What is <strong>40% of 50<\/strong>?<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><em>(Answers: 1=8, 2=30, 3=63, 4=24, 5=20)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Secret to Speed In competitive exams like SSC, Banking, or Railways, every second counts. Calculating percentages the traditional way ($40\/100 \\times 70$) consumes precious time. The Golden Rule: When both numbers end in&#46;&#46;&#46;<\/p>\n","protected":false},"author":2,"featured_media":7284,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7283","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"cp_meta_data":{"_edit_lock":["1782380243:2"],"_thumbnail_id":["7284"],"_edit_last":["2"],"_layout":["inherit"],"_heateor_sss_meta":["a:2:{s:7:\"sharing\";i:0;s:16:\"vertical_sharing\";i:0;}"],"_jetpack_related_posts_cache":["a:1:{s:32:\"8f6677c9d6b0f903e98ad32ec61f8deb\";a:2:{s:7:\"expires\";i:1782488504;s:7:\"payload\";a:3:{i:0;a:1:{s:2:\"id\";i:512;}i:1;a:1:{s:2:\"id\";i:2020;}i:2;a:1:{s:2:\"id\";i:1177;}}}}"]},"jetpack_featured_media_url":"https:\/\/themindpalace.in\/wp-content\/uploads\/2026\/06\/Gemini_Generated_Image_gmrtcigmrtcigmrt.png","jetpack-related-posts":[{"id":2020,"url":"https:\/\/themindpalace.in\/index.php\/2020\/11\/30\/the-triangle-and-its-properties\/","url_meta":{"origin":7283,"position":0},"title":"The Triangle and its Properties","author":"Nancy Diana","date":"November 30, 2020","format":false,"excerpt":"Solved exercise on triangle and its properties Exercise 1. In \u2206PQR, D is the mid-pointof\u00a0QRPM\u00a0isPD\u00a0is \u00a0If QM = MR? Solution:PM is altitude.PD is median.No, QM \u2260 MR. 2. Draw rough sketches for the following (a) In \u2206ABC, BE is a median.(b) In \u2206PQR, PQ and PR are altitudes of the\u2026","rel":"","context":"In &quot;7th Class&quot;","block_context":{"text":"7th Class","link":"https:\/\/themindpalace.in\/index.php\/category\/ncert-school-syllabus\/7th-class-ncert-syllabus\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/11\/properties-of-triangel.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/11\/properties-of-triangel.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/11\/properties-of-triangel.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/11\/properties-of-triangel.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/11\/properties-of-triangel.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":512,"url":"https:\/\/themindpalace.in\/index.php\/2020\/08\/17\/lines-and-angles\/","url_meta":{"origin":7283,"position":1},"title":"Lines and Angles","author":"Nancy Diana","date":"August 17, 2020","format":false,"excerpt":"Summary of lines and angles Solved exercise of lines and angles https:\/\/youtu.be\/2XRviYYOooA Summary This chapter tells you to find out the properties of angel formed when two lines intersect each other and also angles formed when two or more line intersect at distinct point. Uses of Lines and angels Suppose\u2026","rel":"","context":"In &quot;9th Class&quot;","block_context":{"text":"9th Class","link":"https:\/\/themindpalace.in\/index.php\/category\/ncert-school-syllabus\/9th-class-ncert-syllabus\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":1177,"url":"https:\/\/themindpalace.in\/index.php\/2020\/10\/10\/lines-ad-angles-kannada\/","url_meta":{"origin":7283,"position":2},"title":"\u0cb0\u0cc7\u0c96\u0cc6\u0c97\u0cb3\u0cc1 \u0cae\u0ca4\u0ccd\u0ca4\u0cc1 \u0c95\u0ccb\u0ca8\u0c97\u0cb3\u0cc1","author":"The Mind","date":"October 10, 2020","format":false,"excerpt":"\u0cac\u0cbf\u0c82\u0ca6\u0cc1\u0c97\u0cb3\u0cc1 \u0cac\u0cbf\u0c82\u0ca6\u0cc1\u0cb5\u0ca8\u0ccd\u0ca8\u0cc1 \u0c9a\u0cc1\u0c95\u0ccd\u0c95\u0cbf\u0caf\u0cbf\u0c82\u0ca6 \u0cb8\u0cc2\u0c9a\u0cbf\u0cb8\u0cb2\u0cbe\u0c97\u0cc1\u0ca4\u0ccd\u0ca4\u0ca6\u0cc6. \u0c92\u0c82\u0ca6\u0cc1 \u0cac\u0cbf\u0c82\u0ca6\u0cc1\u0cb5\u0cc1 \u0c92\u0c82\u0ca6\u0cc1 \u0cb8\u0ccd\u0ca5\u0cb3\u0cb5\u0ca8\u0ccd\u0ca8\u0cc1 \u0ca8\u0cbf\u0cb0\u0ccd\u0ca7\u0cb0\u0cbf\u0cb8\u0cc1\u0ca4\u0ccd\u0ca4\u0ca6\u0cc6. \u0cb8\u0cbe\u0cae\u0cbe\u0ca8\u0ccd\u0caf \u0cac\u0cbf\u0c82\u0ca6\u0cc1\u0cb5\u0ca8\u0ccd\u0ca8\u0cc1 \u0cb6\u0cc3\u0c82\u0c97\u0cac\u0cbf\u0c82\u0ca6\u0cc1 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Class","link":"https:\/\/themindpalace.in\/index.php\/category\/ncert-school-syllabus\/9th-class-ncert-syllabus\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/08\/vertical-angles.png?resize=1400%2C800&ssl=1 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Properties of quadrilaterals Angle sum\u2026","rel":"","context":"In &quot;English Medium&quot;","block_context":{"text":"English Medium","link":"https:\/\/themindpalace.in\/index.php\/category\/posts-in-english\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/10\/introduction-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/10\/introduction-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/10\/introduction-1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":1327,"url":"https:\/\/themindpalace.in\/index.php\/2020\/10\/19\/integers\/","url_meta":{"origin":7283,"position":4},"title":"INTEGERS","author":"Nancy Diana","date":"October 19, 2020","format":false,"excerpt":"summary of integers Solved exercise of integers Summary An integer is defined as the number that can be written without a fractional components ie,21, 4, 0, and \u22122048.A number which is not a fraction is a whole number that can be positive, negative , or zero. Z is a\u00a0Subset of\u2026","rel":"","context":"In &quot;7th Class&quot;","block_context":{"text":"7th Class","link":"https:\/\/themindpalace.in\/index.php\/category\/ncert-school-syllabus\/7th-class-ncert-syllabus\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/10\/Slide1-18.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/10\/Slide1-18.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/10\/Slide1-18.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/10\/Slide1-18.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":2307,"url":"https:\/\/themindpalace.in\/index.php\/2020\/12\/17\/finding-the-square-of-a-numbers\/","url_meta":{"origin":7283,"position":5},"title":"Finding the Square of a Numbers","author":"Nancy Diana","date":"December 17, 2020","format":false,"excerpt":"Summary of square numbers Solved exercise of square numbers Summary To find the square of any number we needed to divide the number into two parts then we can solve it easily. If number is \u2018x\u2019 then x = (p + q) and x2\u00a0= (p + q)2 You can also\u2026","rel":"","context":"In &quot;8th Class&quot;","block_context":{"text":"8th Class","link":"https:\/\/themindpalace.in\/index.php\/category\/ncert-school-syllabus\/8th-class-ncert-syllabus\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/12\/Picture1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/12\/Picture1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/themindpalace.in\/wp-content\/uploads\/2020\/12\/Picture1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts\/7283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/comments?post=7283"}],"version-history":[{"count":1,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts\/7283\/revisions"}],"predecessor-version":[{"id":7285,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/posts\/7283\/revisions\/7285"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/media\/7284"}],"wp:attachment":[{"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/media?parent=7283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/categories?post=7283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/themindpalace.in\/index.php\/wp-json\/wp\/v2\/tags?post=7283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}