{"id":26993,"date":"2021-06-29T12:41:42","date_gmt":"2021-06-29T07:11:42","guid":{"rendered":"https:\/\/ncertsolutions.guru\/?p=26993"},"modified":"2021-06-29T12:42:44","modified_gmt":"2021-06-29T07:12:44","slug":"ncert-solutions-for-class-7-maths-chapter-12-ex-12-4","status":"publish","type":"post","link":"https:\/\/ncertsolutions.guru\/ncert-solutions-for-class-7-maths-chapter-12-ex-12-4\/","title":{"rendered":"NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Ex 12.4"},"content":{"rendered":"

These NCERT Solutions for Class 7 Maths<\/a> Chapter 12 Algebraic Expressions Ex 12.4 Questions and Answers are prepared by our highly skilled subject experts.<\/p>\n

NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Exercise 12.4<\/h2>\n

Question 1.
\nObserve the patterns of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches and calculators.
\n\"NCERT
\nIf the number of digits formed is taken to be n, the number of segments required to form n digits is given by the algebraic expression appearing on the right of each pattern.
\nHow many segments are required to form 5,10,100 digits of the kind 6, H, 0.
\nAnswer:
\n\"NCERT
\nExpression for number of line segments to form \u2018n\u2019 figures of the kind 5 is 5n + 1
\nFor 5 figures, like segments = 5×5 + 1 = 25+1 = 26
\nFor. 10 figures, the line segments = 5×10+1 = 50+ = 51
\nFor 100 figures, line segments = 5×100+1 = 500 + 1 = 501
\n\"NCERT
\nExpression for number of line segments to form \u2018n figures of the kind 4 is 3n + 1
\nFor 5 figures, line segment = 3 x 5 + 1 = 15 + 1 = 16
\nFor 10 figures line segments = 3 x 10+1 = 30+ 1 = 31
\nFor 100 figures line segments = 3 x 100 +1 = 300 + 1 = 301<\/p>\n

\"NCERT<\/p>\n

\"NCERT
\nExpression of number of line segments to form \u2018n figures of the kind B is 5n + 2
\nFor 5 figures line segments = 5×5 + 2 = 25+ 2 = 27
\nFor 10 figures line segments = 5x 10 + 2 = 50+ 2 = 52
\nFor 100 figures, line segments = 5x 100 + 2 = 500 + 2 = 502<\/p>\n

Question 2.
\nUse the given algebraic expression to complete the table of number pattern.
\n\"NCERT
\nAnswer:
\n(i) For the expression 2n – 1
\n100th term = 2 x 100 – 1
\n= 200 – 1 = 199<\/p>\n

(ii) For the expression 3n + 2
\n5th term = 3 (5) + 2 = 15 + 2 = 17
\n10th term = 3 (10) + 2 = 30 + 2 = 32
\n100th term = 3 (100) + 2 = 300 + 2 = 302<\/p>\n

(iii) For the expression 4n + 1
\n5th term = 4 x 5 +1 = 20+ 1 = 21
\n10th term = 4 x 10 +1= 40+1 = 41
\n100th term = 4 x 100 + 1 = 400 + 1 = 401<\/p>\n

\"NCERT<\/p>\n

(iv) For the expression 7n + 20
\n5th term = 7 x 5 + 20 = 35 + 20 = 55
\n10th term = 7 x 10 + 20 = 70 + 20 = 90
\n100th term = 7 x 100 + 20 = 700 + 20 = 720<\/p>\n

(v) For the expression n2<\/sup> + 1
\n5th term = 52 + 1 = 25 + 1 = 26
\n10th term = 102 + 1 = 100 + 1 = 101<\/p>\n","protected":false},"excerpt":{"rendered":"

These NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Ex 12.4 Questions and Answers are prepared by our highly skilled subject experts. NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Exercise 12.4 Question 1. Observe the patterns of digits made from line segments of equal length. You will find such segmented …<\/p>\n

NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Ex 12.4<\/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":{"spay_email":""},"categories":[9],"tags":[],"yoast_head":"\nNCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Ex 12.4 - NCERT Solutions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ncertsolutions.guru\/ncert-solutions-for-class-7-maths-chapter-12-ex-12-4\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Ex 12.4 - NCERT Solutions\" \/>\n<meta property=\"og:description\" content=\"These NCERT Solutions for Class 7 Maths Chapter 12 Algebraic Expressions Ex 12.4 Questions and Answers are prepared by our highly skilled subject experts. 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