Question 1 - Figure it out - Page 165-167 - Chapter 7 Class 8 - Proportional Reasoning-1(Ganita Prakash)

Transcript

Question 1 (i) Circle the following statements of proportion that are true. (i) 4 : 7 :: 12 : 21To check proportional, we convert them into fractions 4/7=12/21 We need to check if this statement is true 4/7=12/21 4 × 21 = 7 × 12 84 = 84 This is true So, the numbers are in proportion Question 1 (ii) Circle the following statements of proportion that are true. (ii) 8 : 3 :: 24 : 6To check proportional, we convert them into fractions 8/3=24/6 We need to check if this statement is true 8/3=24/6 8 × 6 = 24 × 3 48 = 72 This is not true So, the numbers are not in proportion Question 1 (iii) Circle the following statements of proportion that are true. (iii) 7 : 12 :: 12 : 7To check proportional, we convert them into fractions 7/12=12/7 We need to check if this statement is true 7/12=12/7 7 × 7 = 12 × 12 49 = 144 This is not true So, the numbers are not in proportion Question 1 (iv) Circle the following statements of proportion that are true. (iv) 21 : 6 :: 35 : 10To check proportional, we convert them into fractions 21/6=35/10 We need to check if this statement is true 21/6=35/10 21 × 10 = 35 × 6 210 = 210 This is true So, the numbers are in proportion Question 1 (v) Circle the following statements of proportion that are true. (v) 12 : 18 :: 28 : 12To check proportional, we convert them into fractions 12/18=28/12 We need to check if this statement is true 12/18=28/12 12 × 12 = 28 × 18 144 = 504 This is not true So, the numbers are not in proportion Question 1 (vi) Circle the following statements of proportion that are true. (vi) 24 : 8 :: 9 : 3To check proportional, we convert them into fractions 24/8=9/3 We need to check if this statement is true 24/8=9/3 24 × 3 = 9 × 8 72 = 72 This is true So, the numbers are in proportion