Question

The pair of numbers which have no common
factors except...
(A) 18, 111
(B) 48, 55
(C) 2001, 621 (D) 44, 100
​

Answer 1

Answer:

B (48,55) have no common factors

Step-by-step explanation:

Common factor of 18, 111 is 38*

(8+1= 9 and 1+1+1= 9 both are factors)

Common factor of 48, 55 is nothing

because 55 only comes in table of 1, 5, 55, 11

Common factor of 2001, 621 is 3*

(2+1= 3 and 6+2+1 = 9 both are multiples of 3)

Common factors of 44, 100 is 2*

(44/2 = 22 and 100/2 = 50)

Hence, B is the correct answer

*( I just gave one factor example it may be more.)

Answer 2

B option is right because

(A) in first option 3 is common factor

(C) in third option 3 is common factor

(D) in forth option 2 is 2 times common factor

so now it is clear that third option is correct

i think it will help you!!