Question : Directions: In the following question, select the related number from the given alternatives.
50 : 65 :: 122 : ?
Option 1: 157
Option 2: 145
Option 3: 147
Option 4: 155
Correct Answer: 145
Solution :
Given:
50 : 65 :: 122 : ?
Like, 50 : 65→(7)
2
+ 1 = 49 + 1 = 50;
(7 + 1)
2
+ 1 = (8)
2
+ 1 = 64 + 1 = 65
Similarly, (11)
2
+ 1 = 121 + 1 = 122;
(11 + 1)
2
+ 1 = (12)
2
+ 1 = 144 + 1 = 145
145 is related to 122. Hence, the second option is correct.
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