Question : If A1 and A2 are two distinct prime numbers, then what is the highest common factor of A1 and A2?

Option 1: 3

Option 2: 1

Option 3: 5

Option 4: 2

Question : If K1 and K2 are two distinct prime numbers, then what is the product of the highest common factor and the least common multiple of K1 and K2?

Option 1: $1$

Option 2: $\frac{K1}{K2}$

Option 3: $K1 + K2$

Option 4: $K1 × K2$

Question : If A : B = 3 : 2, B : C = 7 : 5 and C : D = 10 : 3, then what is A : D equal to?

Option 1: 7 : 1

Option 2: 1 : 7

Option 3: 4 : 3

Option 4: 3 : 4

Question : What is the Highest Common Factor of 25, 15, and 75?

Option 1: 7

Option 2: 15

Option 3: 25

Option 4: 5

Question : The highest common factor and the least common multiple of the two numbers are 12 and 120, respectively. If one of the numbers is 60, then what will be the other number?

Option 1: 12

Option 2: 18

Option 3: 20

Option 4: 24