Page 217 - Demo

216 Arrow-Puffin-4_Semester-1 MathsII. List all the factors of the following numbers.1. 1, 2, 3, 4, 6, 12 2. 1, 3, 7, 21 3. 1, 2, 3, 4, 6, 8, 12, 24 4. 1, 2, 4, 8, 165. 1, 2, 3, 5, 6, 10, 15, 30 6. 1, 3, 9, 27, 81 7. 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 728. 1, 2, 4, 8, 16, 32, 64 9. 1, 5, 25 10. 1, 2, 3, 4, 6, 8, 12, 16, 24, 31, 48, 9611. 1, 5, 7, 35 12. 1, 7, 49III. Write 'true' or 'false'. 1. true 2. true 3. false 4. true 5. true 6. false 7. false 8. trueLet's Practise 5.4I. Find the common factors of the given numbers.1. 1, 2 2. 1, 2 3. 1, 2, 4 4. 1, 2, 4 5. 1, 5 6. 1, 2, 3, 67. 1, 2, 4, 5, 10, 20 8. 1,7 9. 1, 2, 4, 8 10. 1, 2, 4 11. 1, 2, 4, 812. 1, 2, 3, 4, 6, 8, 12, 24II. Find the HCF by common factors method. 1. 4 2. 8 3. 12 4. 5 5. 24 6. 6 7. 7 8. 9 9. 12 10. 4 11. 4 12. 5Let's Practise 5.5I. Which of the following numbers are divisible by 2? 4,250 ; 6,878 ; 9,932 II. Which of the following numbers are divisible by 3? 3,063 ; 6,054III. Which of the following numbers are divisible by 5? 2,480 ; 6,570 ; 4,560IV. Which of the following numbers are divisible by 4? 3,240 ; 4,284 ; 4,200V. Which of the following numbers are divisible by 9? 3,402 ; 9009 ; 5,103VI. Which of the following numbers are divisible by 10? 4,000 ; 1,770VII. Do the following.1. 23, 29 2. 31, 37 3. 4, 6, 8, 9, 10, 12, 14, 15, 16, 18 4. 53, 59, 615. 80, 81, 82, 84, 85, 86, 87, 88, 90Let's Practise 5.6I. Write the prime factors of the given numbers by making factor trees.1. 2. 3. 48 2 x 24 2 2 x 12 2 2 2 x 6 2 2 2 2 x 3 60 2 x 30 2 2 x 15 2 2 3 x 5 18 2 x 9 2 3 x 3 5. 72 2 x 36 2 2 x 18 2 2 2 x 9 2 2 2 3 x 3 4. 64 2 x 32 2 2 x 16 2 2 2 x 8 2 2 2 2 x 4 2 2 2 2 2 x 2