EXERCISE 2 (OBJECTIVE TYPE QUESTIONS H.C.F. AND L.C.M. OF NUMBERS. ) (in 31 to 40)

31. 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

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

33. the product of two numbers is 4107. if the H.C.F. of these numbers is 37, then the greater number is:

a)101                                                               b)107

c)111                                                               d)185

34. the product of two numbers is 2028 and their H.C.F.  is 13. the number of  such pairs is:

a)1                                                                   b) 2

c) 3                                                                  d)4

35. three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. the sum of the three numbers.

a)75                                                                 b)81

c)85                                                                 d)89

36. the L.C.M number is 48. the numbers are in the ratio 2:3. the sum of the numbers is: