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Home › Grade8 › OLYMPIAD › Math Olympiad-Grade-8 › H.C.F. & L.C.M. of Numbers › H.C.F. & L.C.M. of Numbers Worksheet-2

H.C.F. & L.C.M. of Numbers Worksheet-2

H.C.F. & L.C.M. of Numbers Worksheet-2

 

  1. The L.C.M. of 22, 54, 108, 135 and 198 is :

(a) 330               (b) 1980             (c) 5940             (d) 11880

 

  1. The H.C.F. of and is :

(a)                    (b)                 (c)               (d)

 

  1. The H.C.F. of and is :

(a)                    (b)               (c)            (d)

 

  1. The L.C.M. of is:

(a)                 (b)                 (c)                 (d) None of these

 

  1. The L.C.M. of is :

(a) 36                  (b)                 (c)             (d)

 

  1. The H.C.F. of 1.75, 5.6 and 7 is :

(a) 0.07              (b) 0.7                (c) 3.5                 (d) 0.35

 

  1. The G.C.D. of 1.08, 0.36 and 0.9 is:

(a) 0.09              (b) 0.9                (c) 0.18              (d) 0.108

 

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

(a) 1.8                 (b) 0.18              (c) 0.018            (d) 18

 

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

(a) 2.7                 (b) 0.27              (c) 0.027            (d) 27

 

  1. H.C.F. of 3240, 3600 and a third number is 36 and their L.C.M. is 24 × 35 × 52 × 72. The third number is :

(a) 22 × 35 × 72                              (b) 22 × 53 × 72

(c) 25 × 52 × 72                              (d) 23 × 35 × 72

 

  1. Three numbers are in the ratio 1:2:3 and their H.C.F. is 12. The numbers are:

(a) 4, 8, 12         (b) 5, 10, 15       (c) 10, 20, 30    (d) 12, 24, 36

 

  1. 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

 

  1. 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

 

  1. 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) 3                    (d) 12

 

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

(a) 3                    (b) 4                    (c) 5                    (d) 6

 

Answer Key:

(1)-c; (2)-b; (3)-c; (4)-c; (5)-a; (6)-a; (7)-a; (8)-b; (9)-d; (10)-a; (11)-d; (12)-d; (13)-a; (14)-a; (15)-b