{"id":191553,"date":"2026-01-11T22:40:00","date_gmt":"2026-01-11T17:10:00","guid":{"rendered":"https:\/\/www.practicemock.com\/blog\/?p=191553"},"modified":"2026-01-09T17:05:50","modified_gmt":"2026-01-09T11:35:50","slug":"number-system-questions-for-rrb-group-d","status":"publish","type":"post","link":"https:\/\/www.practicemock.com\/blog\/number-system-questions-for-rrb-group-d\/","title":{"rendered":"Number System Questions for RRB Group D: Download Free PDF"},"content":{"rendered":"\n<p><\/p>\n\n\n<div class=\"yoast-breadcrumbs\"><span><span><a href=\"https:\/\/www.practicemock.com\/blog\/\">Home<\/a><\/span> \u00bb <span><a href=\"https:\/\/www.practicemock.com\/blog\/category\/rrb-group-d\/\">RRB Group D<\/a><\/span> \u00bb <span class=\"breadcrumb_last\" aria-current=\"page\">Number System Questions for RRB Group D<\/span><\/span><\/div>\n\n\n<p><\/p>\n\n\n\n<p>Are you working hard to get a government job in <strong><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d\/\" target=\"_blank\" rel=\"noreferrer noopener\">Indian Railways<\/a><\/strong>? For millions of students, the RRB Group D exam is the biggest chance to secure a stable life. But to clear the Computer-Based Test (CBT), you cannot run away from Mathematics. We know that many of you come from non-math backgrounds and feel nervous about calculations. But here is the good news: The Math asked in RRB Group D is very simple. It is strictly based on the Class 10th level. The best chapter to start your preparation is the Number System. It is the easiest topic because it deals with basic numbers, odd-even rules, and simple divisions. You don&#8217;t need complex formulas here. If you master this, you can easily secure 2-3 marks in just a few minutes. To help you practice without stress, we have selected the most repeated Number System questions for RRB Group D in a free PDF that you can download from this blog.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.practicemock.com\/rrb-group-d-test-series\/?next=https%3A%2F%2Fs1.practicemock.com%2Fexams%2F%3Fc%3Dssctopicqa%26i%3Dssc&amp;ref=15008\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Attempt Free Number System Tests for RRB Group D Exam<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why is the Number System Important for RRB Group D?<\/h2>\n\n\n\n<p>In the Mathematics section (25 questions), the Number System is the foundation stone.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Easy Marks:<\/strong> You can expect <strong>2 to 3 questions<\/strong> in every shift. These are often the easiest questions in the entire paper.<\/li>\n\n\n\n<li><strong>No Big Formulas:<\/strong> You solve these questions using common sense logic, like &#8220;Is this number divisible by 2?&#8221; or &#8220;What is the last digit?&#8221;.<\/li>\n\n\n\n<li><strong>Helps in Other Topics:<\/strong> If you are good at Number System, you will solve HCF-LCM and Simplification questions much faster.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Download Free PDF of Number System Questions for RRB Group D<\/h2>\n\n\n\n<p>We have prepared a comprehensive PDF containing exam-level questions. We have chosen questions that are exactly at the RRB Group D level\u2014focusing on facts and simple logic rather than long calculations. Download it, save it, and practice these questions to build your confidence.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.practicemock.com\/rrb-group-d-test-series\/?next=https%3A%2F%2Fs1.practicemock.com%2Fexams%2F%3Fc%3Ddashboard%26i%3Dssc%26dl%3Dhttps%253A%252F%252Fwww.practicemock.com%252Fpricing%252Fmarketing%252Ffiles%252Fpdf%252Fnumber-system-questions-pdf-for-rrb-group-d.pdf&amp;ref=15008\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Download Free PDF of Number System Questions for RRB Group D<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>Q1. Find the difference between the Place Value and Face Value of 7 in the number 67432.<\/p>\n\n\n\n<p>(a) 6993<br>(b) 7000<br>(c) 6930<br>(d) 7<\/p>\n\n\n\n<p>Answer: (a) 6993<\/p>\n\n\n\n<p>Logic:<br>Place Value of 7 = 7000<br>Face Value of 7 = 7<br>Difference = 7000 \u2212 7 = 6993<\/p>\n\n\n\n<p>Q2. Which of the following numbers is divisible by 3?<\/p>\n\n\n\n<p>(a) 1243<br>(b) 1242<br>(c) 1244<br>(d) 1241<\/p>\n\n\n\n<p>Answer: (b) 1242<\/p>\n\n\n\n<p>Logic:<br>Sum of digits must be divisible by 3<br>1 + 2 + 4 + 2 = 9<br>9 is divisible by 3 \u2192 number is divisible<\/p>\n\n\n\n<p>Q3. The product of two consecutive even numbers is 168. Find the sum of these numbers.<\/p>\n\n\n\n<p>(a) 26<br>(b) 24<br>(c) 28<br>(d) 22<\/p>\n\n\n\n<p>Answer: (a) 26<\/p>\n\n\n\n<p>Logic:<br>Even numbers close to \u221a168<br>\u221a168 \u2248 13<\/p>\n\n\n\n<p>Even numbers around 13 = 12 and 14<br>12 \u00d7 14 = 168<\/p>\n\n\n\n<p>Sum = 12 + 14 = 26<\/p>\n\n\n\n<p>Q4. What is the unit digit of 124\u2074 + 124\u2075 ?<\/p>\n\n\n\n<p>(a) 0<br>(b) 2<br>(c) 4<br>(d) 6<\/p>\n\n\n\n<p>Answer: (a) 0<\/p>\n\n\n\n<p>Logic:<br>4 to even power ends in 6<br>4 to odd power ends in 4<\/p>\n\n\n\n<p>124\u2074 \u2192 last digit 6<br>124\u2075 \u2192 last digit 4<\/p>\n\n\n\n<p>6 + 4 = 10<br>Unit digit = 0<\/p>\n\n\n\n<p>Q5. When a number is divided by 56, the remainder is 29. What will be the remainder when the same number is divided by 8?<\/p>\n\n\n\n<p>(a) 4<br>(b) 5<br>(c) 3<br>(d) 7<\/p>\n\n\n\n<p>Answer: (b) 5<\/p>\n\n\n\n<p>Logic:<br>Just divide the remainder 29 by 8<\/p>\n\n\n\n<p>29 \u00f7 8 leaves remainder 5<\/p>\n\n\n\n<p>Q6. Which is the smallest 3-digit prime number?<\/p>\n\n\n\n<p>(a) 103<br>(b) 107<br>(c) 101<br>(d) 109<\/p>\n\n\n\n<p>Answer: (c) 101<\/p>\n\n\n\n<p>Logic:<br>100 is not prime<br>101 is not divisible by 2, 3, 5, or 7<br>So 101 is smallest 3-digit prime<\/p>\n\n\n\n<p>Q7. Simplify: 0.636363\u2026 + 0.373737\u2026<\/p>\n\n\n\n<p>(a) 1.0101\u2026<br>(b) 1.00<br>(c) 0.99<br>(d) 100\/99<\/p>\n\n\n\n<p>Answer: (a) 1.0101\u2026<\/p>\n\n\n\n<p>Logic:<br>0.636363\u2026 = 63\/99<br>0.373737\u2026 = 37\/99<\/p>\n\n\n\n<p>63\/99 + 37\/99 = 100\/99 = 1.0101\u2026<\/p>\n\n\n\n<p>Q8. The sum of the first 50 natural numbers is:<\/p>\n\n\n\n<p>(a) 1275<br>(b) 1225<br>(c) 1250<br>(d) 5050<\/p>\n\n\n\n<p>Answer: (a) 1275<\/p>\n\n\n\n<p>Logic:<br>Use formula n(n+1)\/2<\/p>\n\n\n\n<p>50 \u00d7 51 \/ 2 = 25 \u00d7 51 = 1275<\/p>\n\n\n\n<p>Q9. If the number 483&#215;5 is divisible by 9, then the missing digit x is:<\/p>\n\n\n\n<p>(a) 5<br>(b) 6<br>(c) 7<br>(d) 8<\/p>\n\n\n\n<p>Answer: (c) 7<\/p>\n\n\n\n<p>Logic:<br>Sum of digits = 4 + 8 + 3 + x + 5 = 20 + x<br>Next multiple of 9 after 20 is 27<\/p>\n\n\n\n<p>20 + x = 27 \u2192 x = 7<\/p>\n\n\n\n<p>Q10. What is the value of \u221a(10 + \u221a(25 + \u221a121))<\/p>\n\n\n\n<p>(a) 4<br>(b) 5<br>(c) 6<br>(d) 3<\/p>\n\n\n\n<p>Answer: (a) 4<\/p>\n\n\n\n<p>Logic:<br>\u221a121 = 11<br>\u221a(25 + 11) = \u221a36 = 6<br>\u221a(10 + 6) = \u221a16 = 4<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.practicemock.com\/rrb-group-d-test-series\/?next=https%3A%2F%2Fs1.practicemock.com%2Fexams%2F%3Fc%3Ddashboard%26i%3Dssc%26dl%3Dhttps%253A%252F%252Fwww.practicemock.com%252Fpricing%252Fmarketing%252Ffiles%252Fpdf%252Fnumber-system-questions-pdf-for-rrb-group-d.pdf&amp;ref=15008\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Download Free PDF of Number System Questions for RRB Group D<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5 Preparation Tips to Master the Number System<\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Understand Place Value vs. Face Value:<\/strong> This is a guaranteed question in Group D. Remember: <strong>Face<\/strong> value is the number itself (Face never changes). <strong>Place<\/strong> value depends on where it sits (Units, Tens, Hundreds).<\/li>\n\n\n\n<li><strong>Master Divisibility Rules:<\/strong> You must know the rules for 2, 3, 4, 5, 8, 9, and 11. Most questions are simply checking if you know that for 4, you only check the last 2 digits.<\/li>\n\n\n\n<li><strong>Learn Square Roots:<\/strong> Memorize squares up to 25. Often, questions like sqrt(? + sqrt(?)) come, and if you know squares, you can solve them mentally without pen and paper.<\/li>\n\n\n\n<li><strong>Practice BODMAS:<\/strong> In simplification questions, never guess. Always follow the order: Bracket -> Division -> Multiplication -> Addition -> Subtraction.<\/li>\n\n\n\n<li><strong>Use the &#8220;Unit Digit&#8221; Trick:<\/strong> For big multiplication questions (like 567 x 983), don&#8217;t multiply the whole thing. Just multiply the last digits (7 x 3 = 21, so the answer ends in 1). Check the options and mark the answer.<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.practicemock.com\/?next=https%3A%2F%2Fwww.practicemock.com%2Fs1pricing%2Findex.php%3Fc%3Dsscpro&amp;ref=14981\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1141\" height=\"700\" src=\"https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2025\/10\/SSC-Packages.png\" alt=\"Budget-friendly online courses for SSC, Railways, and State exams, detailing 'SSC Pro' and 'SSC Prime' features.\" class=\"wp-image-183927\"\/><\/a><\/figure><\/div>\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><em>Join our exclusive Telegram group for expert guidance, personalized tips, and real-time solutions to boost your SSC exam prep. [<a href=\"https:\/\/t.me\/practicemockssc\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Click here to join now!<\/a>]<\/em><\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td colspan=\"2\"><strong>Other Blogs Related to RRB Group D<\/strong><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d-syllabus\/\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D Syllabus<\/a><\/td><td><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d-study-plan-2025-for-1-month\/\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D Study Plan for 1 Month<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d-previous-year-question-paper\/\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D Previous Year Question Papers<\/a><\/td><td><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d-selection-process\/\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D Selection Process<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d-salary\/\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D Salary<\/a><\/td><td><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d-cut-off\/\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D Cut Off<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/rrb-group-d-vacancy-2025\/\" target=\"_blank\" rel=\"noreferrer noopener\">RRB Group D Vacancy<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQs: Number System Questions for RRB Group D<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1767765023444\"><strong class=\"schema-faq-question\">Is Number System difficult in RRB Group D?<\/strong> <p class=\"schema-faq-answer\">No. It is the easiest topic. The level is basic (Class 10). Questions are direct and concept-based.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1767765053578\"><strong class=\"schema-faq-question\">How many questions can I expect from this topic?<\/strong> <p class=\"schema-faq-answer\">You will definitely see 2 to 3 questions in the Mathematics section.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1767765065912\"><strong class=\"schema-faq-question\">What is the most important type of question?<\/strong> <p class=\"schema-faq-answer\">Divisibility rules (especially for 3, 9, and 11) and Unit Digit calculations are the most frequently asked types.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1767765077655\"><strong class=\"schema-faq-question\">Do I need to learn complex theorems?<\/strong> <p class=\"schema-faq-answer\">No. Avoid high-level theorems like Fermat\u2019s or Wilson\u2019s. Stick to basic NCERT level concepts of factors and multiples.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Click to download the free PDF of exam-level Number System Questions for RRB Group D exam. Solve these questions to boost your preparation.<\/p>\n","protected":false},"author":25,"featured_media":191554,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[2067],"tags":[],"class_list":["post-191553","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rrb-group-d"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Number System Questions for RRB Group D: Download Free PDF<\/title>\n<meta name=\"description\" content=\"Click to download the free PDF of exam-level Number System Questions for RRB Group D exam. 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