n<\/sup>, hence it will have terminating decimal expansion.<\/p>\n(ii) \\(\\frac { 17 }{ 8 }\\) = \\(\\frac { 17 }{ 8 }\\) \nIt will have terminating decimal expansion.<\/p>\n
(iii) \\(\\frac { 64 }{ 455 }\\) = \\(\\frac{64}{5 \\times 7 \\times 13}\\) \nNon terminating repeating decimal expansion.<\/p>\n
(iv) \\(\\frac{15}{1600}\\) = \\(\\frac{15}{2^{2} \\times 5^{2}}\\) \nIt will have terminating decimal expansion.<\/p>\n
(v) \\(\\frac { 29 }{ 343 }\\) = \\(\\frac{29}{7^{3}}\\) \nNon terminating repeating decimal expansion.<\/p>\n
(vi) \\(\\frac{23}{2^{3} 5^{2}}\\) \nIt will have terminating decimal expansion.<\/p>\n
(vii) \\(\\frac{129}{2^{2} 5^{7} 7^{5}}\\) \nNon terminating repeating decimal expansion.<\/p>\n
(viii) \\(\\frac { 6 }{ 15 }\\) = \\(\\frac{6}{3 \\times 5}\\) \nIt will have terminating decimal expansion.<\/p>\n
(ix) \\(\\frac { 35 }{ 50 }\\) = \\(\\frac{35}{2 \\times 5^{2}}\\) \nIt will have terminating decimal expansion.<\/p>\n
(x) \\(\\frac { 77 }{ 210 }\\) = \\(\\frac{17}{2 \\times 3 \\times 5 \\times 7}\\) \nNon terminating repeating decimal expansion.<\/p>\n
<\/p>\n
Question 2. \nWrite down the decimal expansion of those rational numbers in Question 1 above which terminating decimal expansions. \nSolution: \n(i) \\(\\frac { 13 }{ 3125 }\\) = 0.00146 \n(ii) \\(\\frac { 17 }{ 8 }\\) = 2.125 \n(iii) \\(\\frac { 15 }{ 1600 }\\) = 0.009375 \n(iv) \\(\\frac{23}{2^{3} 5^{2}}\\) = \\(\\frac { 23 }{ 200 }\\) = 0.115 \n(v) \\(\\frac { 6 }{ 15 }\\) = 0.4 \n(vi) \\(\\frac { 35 }{ 50 }\\) = 0.7<\/p>\n
<\/p>\n
Question 3. \nThe following real numbers have decimal expansions as given below. In each case decide whether they are rational or not. If they are rational and of the form \\(\\frac { p }{ q }\\), what can you say about the prime factors of q? \n(i) 43.123456789 \n(ii) 0.120120012000120000 \n(iii) \\(43 . \\overline{123456789}\\) \nSolution: \n(i) 43.123456789 \n\\(=\\frac{43123456789}{1000000000}=\\frac{43123456789}{2^{9} 5^{9}}\\) \nit is a rational, number The prime factors of q are 29<\/sup>59<\/sup><\/p>\n(ii) 0.120120012000120000 ……. \n\\(\\begin{aligned} \n&=\\frac{120120012000012}{100000000000000 \\ldots \\ldots . .} \\\\ \n&=\\frac{120120012000012}{\\left(2^{1} \\times 2^{2} \\times 2^{3} \\ldots . .\\right) \\times\\left(5^{1} \\times 5^{2} \\times 5^{3} . \\ldots .\\right)} \n\\end{aligned}\\) \nit is a rational number The prime factors of q are (21<\/sup> x 2\u00b2 x 2\u00b3 ….) x (51<\/sup> x 5\u00b2 x 5\u00b3 ….)<\/p>\n(iii) \\(43 . \\overline{123456789}\\) \nIt is not-terminating decimal expansion. \nBut it is a rational number, whose prime factors of q will also have a factor other than 2 or 5.<\/p>\n","protected":false},"excerpt":{"rendered":"
These NCERT Solutions for Class 10 Maths Chapter 1 Real Numbers Ex 1.4 Questions and Answers are prepared by our highly skilled subject experts. NCERT Solutions for Class 10 Maths Chapter 1 Real Numbers Exercise 1.4 Question 1. Without actually performing the long division, state whether the following rational numbers will have a terminating decimal …<\/p>\n
NCERT Solutions for Class 10 Maths Chapter 1 Real Numbers Ex 1.4<\/span> Read More »<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","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":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","spay_email":""},"categories":[2],"tags":[],"yoast_head":"\nNCERT Solutions for Class 10 Maths Chapter 1 Real Numbers Ex 1.4 - MCQ Questions<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n