8, 24, 12, 36, 18, 54, (......) (a) 27        (b) 108        (c) 68        (d) 72

8, 7, 11, 12, 14, 17, 17, 22, (.....) (a) 27 (b) 20 (c) 22 (d) 24

36, 54, 18, 27, 9, 18.5, 4.5 (a) 4.5 (b) 18.5 (c) 54 (d) 18

16, 25, 36, 72, 144, 196, 225 (a) 36 (b) 72 (c) 196 (d) 225

The G.C.D. of 1.08, 0.36 and 0.9 is (a) 0.03 (b) 0.9 (c) 0.18 (d) 0.108

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

If 4,\ a ,\ a ,\ 36 are in proportion, then a= (a) 24 (b) 12 (c) 3 (d) 24

The H.C.F.of 0.54,1.8 and 7.2 is (a) 1.80.18, (c) 0.018

Find the LCM of 1.8 , 0.54 and 7.2.

Find the HCF of the following numbers : (a) 18, 48 (b) 30, 42 (c) 18, 60 (d) 27, 63 (e) 36, 84 (f) 34, 102 (g) 70, 105, 175 (h) 91, 112, 49 (i) 18, 54, 81 (j) 12, 45, 75