Maths Answers Class 10 Ncert - 5161 Words

ANSWERS/HINTS 345 APPENDIX 1 ANSWERS/ HINTS EXERCISE 1.1 1. (i) 45 3. 8 columns 4. An integer can be of the form 3q, 3q + 1 or 3q + 2. Square all of these integers. 5. An integer can be of the form 9q, 9q + 1, 9q + 2, 9q + 3, . . ., or 9q + 8. (ii) 196 (iii) 51 2. An integer can be of the form 6q, 6q + 1, 6q + 2, 6q + 3, 6q + 4 or 6q + 5. EXERCISE 1.2 1. 2. 3. (i) 2 Ãâ€" 5 Ãâ€" 7 (iv) 5 Ãâ€" 7 Ãâ€" 11 Ãâ€" 13 (i) LCM = 182; HCF = 13 (i) LCM = 420; HCF = 3 2 (ii) 22 Ãâ€" 3 Ãâ€" 13 (v) 17 Ãâ€" 19 Ãâ€" 23 (ii) LCM = 23460; HCF = 2 (ii) LCM = 1139; HCF = 1 7. 36 minutes (iii) 32 Ãâ€" 52 Ãâ€" 17 (iii) LCM = 3024; HCF = 6 (iii) LCM = 1800; HCF = 1 4. 22338 EXERCISE 1.4 1. (i) Terminating (iii) Non-terminating repeating (v) Non-terminating repeating (vii) Non-terminating†¦show more content†¦(ii) x – y = 18, x + y = 180, where x and y are the measures of the two angles in degrees; x = 99, y = 81. (iii) 7x + 6y = 3800, 3x + 5y = 1750, where x and y are the costs (in Rs) of one bat and one ball respectively; x = 500, y = 50. (iv) x + 10y = 105, x + 15y = 155, where x is the fixed charge (in Rs) and y is the charge (in Rs per km); x =5, y = 10; Rs 255. (v) 11x – 9y + 4 = 0, 6x – 5y + 3 = 0, where x and y are numerator and denominator of the fraction; 7 ( x = 7, y = 9). 9 (ii) s = 9, t = 6 (v) x = 0, y = 0 (iii) y = 3x – 3, (vi) x = 2, y = 3 where x can take any value, i.e., infinitely many solutions. (vi) x – 3y – 10 = 0, x – 7y + 30 = 0, where x and y are the ages in years of Jacob and his son; x = 40, y = 10. EXERCISE 3.4 1. (i) x = 19 6 , y= 5 5 (ii) x = 2, y = 1 (iii) x = 9 5 ,y= − 13 13 (iv) x = 2, y = –3 2. (i) x – y + 2 = 0, 2x – y – 1 = 0, where x and y are the numerator and denominator of the fraction; 3 â‹… 5 (ii) x – 3y + 10 = 0, x – 2y – 10 = 0, where x and y are the ages (in years) of Nuri and Sonu respectively. Age of Nuri (x) = 50, Age of Sonu (y) = 20. (iii) x + y = 9, 8x – y = 0, where x and y are respectively the tens and units digits of the number; 18. (iv) x + 2y = 40, x + y = 25, where x and y are respectively the number of Rs 50 and Rs 100 notes; x = 10, y = 15. (v) x + 4y = 27, x + 2y = 21, where x is the fixed charge (in Rs) and y is the additional charge (in Rs) per day; xShow MoreRelatedPositive Association Between Mean Ses Intake Composition And School Mean Performance1615 Words   |  7 Pagesfive districts of state. A maximum of 25 students and five teachers per school were selected, using systemic selection with a random start. The largest sample was subjected to standardized tests in language and mathematics. These tests were based on class IV curriculum. Background information on pupils, teachers and schools was collected through personal interview using pre-test instruments by the investigator. Preliminary analysis was-conducted using Ordinary Least Squares to important predictor variables