{"id":228783,"date":"2025-06-07T14:29:38","date_gmt":"2025-06-07T14:29:38","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=228783"},"modified":"2025-06-07T14:29:40","modified_gmt":"2025-06-07T14:29:40","slug":"find-the-lowest-common-multiple-lcm-of-56-and-42","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/07\/find-the-lowest-common-multiple-lcm-of-56-and-42\/","title":{"rendered":"Find the lowest common multiple (LCM) of 56 and 42"},"content":{"rendered":"\n<p>Find the lowest common multiple (LCM) of 56 and 42<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Answer:<\/strong><\/h3>\n\n\n\n<p>The <strong>lowest common multiple (LCM)<\/strong> of <strong>56<\/strong> and <strong>42<\/strong> is <strong>168<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation:<\/strong><\/h3>\n\n\n\n<p>To find the <strong>lowest common multiple (LCM)<\/strong> of two numbers, we are looking for the smallest number that is <strong>divisible by both<\/strong> original numbers. This is useful in solving problems involving synchronization, scheduling, or combining different repeating cycles.<\/p>\n\n\n\n<p>There are multiple ways to find the LCM, but one of the most efficient is by using the <strong>prime factorization method<\/strong> or the formula involving the <strong>greatest common divisor (GCD)<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 1: Prime Factorization<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>56 = 2 \u00d7 2 \u00d7 2 \u00d7 7 = 2\u00b3 \u00d7 7<\/li>\n\n\n\n<li>42 = 2 \u00d7 3 \u00d7 7 = 2 \u00d7 3 \u00d7 7<\/li>\n<\/ul>\n\n\n\n<p>To find the LCM, take the <strong>highest powers<\/strong> of all the <strong>prime factors<\/strong> that appear in either number:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2\u00b3 (from 56)<\/li>\n\n\n\n<li>3\u00b9 (from 42)<\/li>\n\n\n\n<li>7\u00b9 (common to both)<\/li>\n<\/ul>\n\n\n\n<p>Now multiply the highest powers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LCM = 2\u00b3 \u00d7 3 \u00d7 7 = 8 \u00d7 3 \u00d7 7 = 24 \u00d7 7 = <strong>168<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Step 2: Using the GCD<\/strong><\/h4>\n\n\n\n<p>You can also use this formula: LCM(a,b)=a\u00d7bGCD(a,b)\\text{LCM}(a, b) = \\frac{a \\times b}{\\text{GCD}(a, b)}LCM(a,b)=GCD(a,b)a\u00d7b\u200b<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Find the GCD of 56 and 42.<br>The common factors are:\n<ul class=\"wp-block-list\">\n<li>56 = 2\u00b3 \u00d7 7<\/li>\n\n\n\n<li>42 = 2 \u00d7 3 \u00d7 7<br>\u21d2 GCD = 2 \u00d7 7 = 14<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Now apply the formula: LCM(56,42)=56\u00d74214=235214=168\\text{LCM}(56, 42) = \\frac{56 \u00d7 42}{14} = \\frac{2352}{14} = 168LCM(56,42)=1456\u00d742\u200b=142352\u200b=168<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Conclusion:<\/strong><\/h3>\n\n\n\n<p>The LCM of 56 and 42 is <strong>168<\/strong>, meaning 168 is the smallest number that both 56 and 42 divide evenly into. This result is confirmed using both prime factorization and the GCD method, making the answer reliable and mathematically sound.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner4-621.jpeg\" alt=\"\" class=\"wp-image-228784\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Find the lowest common multiple (LCM) of 56 and 42 The Correct Answer and Explanation is: Answer: The lowest common multiple (LCM) of 56 and 42 is 168. Explanation: To find the lowest common multiple (LCM) of two numbers, we are looking for the smallest number that is divisible by both original numbers. This is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-228783","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/228783","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=228783"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/228783\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=228783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=228783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=228783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}