24. The H.C.F of 0.54, 1.8 and 7.2 is :

A.1.8

B.0.18

C.0.018

D.18

25. The L.C.M. of 3, 2.7 and 0.09 is :

A.2.7

B.0.27

C.0.027

D.27

28. The ratio of two numbers is 3 : 4 and their H. C. F is 4 Their L.C.M is

A.12

B.16

C.24

D.48

29. The sum of two numbers is 216 and their H.C.F. is 27. The numbers are :

A.27, 189

B.81, 189

C.108, 108

D.154, 162

30. The sum of two numbers is 528 and their H.C.F. is 33. The number of pairs of numbers satisfying the above conditions is :

A.4

B.6

C.8

D.12

31. The number of number-pairs lying between 40 and 100 with their H.C.F of their H.C.F as 15 is :

A.3

B.4

C.5

D.6

32. The H.C.F. of two numbers is 12 and their difference is 12. The numbers are

A.66,78

B.70,82

C.94,106

D.84,96

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