Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
75 : 63 :: 189 : 171 :: 55 : ?
Answer & explanation
Correct answer: option 1
75 : 63 :: 189 : 171 :: 55 : ?
The logic followed here is :
75 : 63
75 ⇒ 7 + 5 = 12
and 75 - 12 = 63
189 : 171
189 ⇒ 1 + 8 + 9 = 18
and 189 - 18 = 171
Similarly
55 :
55 ⇒ 5 + 5 = 10
and 55 - 10 = 45