Are the following ratio in proportion ?
(i) 3.2: 4 and 8 : 10
(ii) 1:2 and 2:1

Check whether the following are in proportion or not : (i) 2,4,6,8 (ii) 12, 18, 10 ,15

Insert 4 rational numbers in between each pair of the following pairs of rational numbers ? (i) 1/7 and 1/8 (ii) 1/10 and 1/11 (iii) 8 and 9 (iv) -3 and -2

Express the following ratios as percentage : (i) 1 : 5 (ii) 2:3 (iii) 4:9

Find the sum of indicated terms of each of the following geometric progressions : (i) 2, 4, 8, 16 ,…, 20 terms (ii) 1 , (-2)/(3) , (4)/(9) , (-8)/(27) ,…, 10 terms

Find the sum of indicated terms of each of the following geometric progressions : (i) 2, 4, 8, 16 ,…, 20 terms (ii) 1 , (-2)/(3) , (4)/(9) , (-8)/(27) ,…, 10 terms

Which ratio is larger in the following pairs? (i) 4:7\ or\ 5:8 (ii) 9: 20\ or\ 8: 13 (iii) 1:2\ or\ 13 : 27

Find the fourth proportional to : (i) 1.5 , 4.5 and 3.5 (ii) 3a, 6a^(2) and 2ab^(2)

Express each of the following ratios in simplest form, (i) (1)/(4) : (1)/(6) (ii) 8(1)/(3) : 6(1)/(4) (iii) 8.5 : 10

Using determinants show that the following points are collinear: (i) (3, -2), (8, 8) and (5, 2) (ii) (2, 3), (-1, -2) and (5, 8)