Question : Two numbers are in the ratio 7 : 11. If their HCF is 28, then the difference between the two numbers is:

Option 1: 28

Option 2: 308

Option 3: 112

Option 4: 196

Question : If the sum of two numbers is 60 and their HCF and LCM are 5 and 60, respectively, then the sum of the reciprocals of the numbers will be:

Option 1: $\frac{1}{11}$

Option 2: $\frac{1}{6}$

Option 3: $\frac{1}{4}$

Option 4: $\frac{1}{5}$

Question : If the square of the sum of two numbers is equal to 4 times their product, then the ratio of these numbers is:

Option 1: 2 : 1

Option 2: 1 : 3

Option 3: 1 : 1

Option 4: 1 : 2

Question : If three numbers are in the ratio of 1 : 3 : 7, and their LCM is 336, then their HCF is:

Option 1: 16

Option 2: 18

Option 3: 10

Option 4: 12

Question : The ratio of the two numbers is 5 : 7 and their HCF is 3. Their LCM is:

Option 1: 75

Option 2: 105

Option 3: 125

Option 4: 35