1) About the number of pairs which have 16 as their H.C.F. and 136 as their L.C.M., we can definitely say that:



(a) no such pair exists



(b) only one such pair exists



(c) only two such pairs exist



(d) many such pairs exist



2) The L.C.M. of three different numbers is 120. Which of the following cannot be their H.C.F. ?



(a) 8



(b) 12



(c) 24



(d) 35



3) The H.C.F. of two numbers is 8. Which one of the following can never be their L.C.M. ?



(a) 24



(b) 48



(c) 56



(d) 60



4) The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is :



(a) 276



(6) 299





(c) 322



(d) 345



5) 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

Edited by: HELP