The number 87846 is divisible by

(a)

2 only

(b)

3 only

(c)

11 only

(d)

all of these

Which of the following pairs is co-prime?

(a)

51, 63

(b)

52, 91

(c)

71, 81

(d)

81, 99

The greatest 4 digit number which is exactly divisible by 8, 9 and 12 is

(a)

9999

(b)

9996

(c)

9696

(d)

9936

The HCF of two numbers is 2 and their LCM is 154. If the difference between the numbers is 8, then the sum is

(a)

26

(b)

36

(c)

46

(d)

56

Which of the following cannot be the HCF of two numbers whose LCM is 120?

(a)

60

(b)

40

(c)

80

(d)

30