Content text Integrated Series 7th Class Maths - Solutions.pdf
Class 7 Mathematics Table of Content 1. Integers 1 – 8 2. Fractions, Decimals and Rational Numbers 9 – 33 3. Data Handling 34 – 51 4. Simple Equations 52 – 61 5. Lines and Angles 62 – 78 6. Triangle And Its Properties 79 – 100 7. Congruency Of Triangles 101 – 118 8. Ratio and Applications 119 – 133 9. Practical Geometry – 10. Perimeter and Area 134 – 151 11. Algebraic Expressions 152 – 158 12. Exponents and Powers 159 – 171 13. Symmetry 172 – 181 14. Visualizing Solid Shapes 182 – 192
Class 7 – Maths | I-7 Integers 2 8. Correct option: (D) 1 hours 32 minutes 3 hours 20 minutes = 3 × 60 + 20 = 200 minutes 1 hours 48 minutes = 1 × 60 + 48 = 108 minutes 3hrs 20 min − 1hrs48min = 200 − 108 = 92 min = 1hrs 32 min 9. Correct option: (D) 15 Let the three integers be x, x + 2, x + 4 Given that three times the first three consecutive odd integers are 3 more than twice the third 3x = 2(x + 4) + 3 x = 11 Third integer is 11 + 4 = 15 10. Correct option: (D) 1270 225 − (−145) + 1000 − (50) × (2) = 225 + 145 + 1000 − 100 = 1270 11. Correct option: (C) 216 (−6) × (−6) × (−6) = −216 So, it is negative of 216 12. Correct option: (A) -576 (−8) × (−4) × (6) × (−3) = −576 13. Correct option: (C) 6 5 {42 ÷ (−7)} ÷ {(−25) ÷ 5} = (−6) ÷ (−5) = 6 5 14. Correct option: (C) 110 [36 × 25 + (10) × (−2)] ÷ 8 = (900 − 20) ÷ 8 = 880 8 = 110 15. Correct option: (C) 65 Average of 54, 61, 70, 75 is = 54 + 61 + 70 + 75 4 = 260 4 = 65