Question : Directions: In the following question, select the related number from the given alternatives.
10 : 99 :: ? : ?
Option 1: 6 : 37
Option 2: 7 : 45
Option 3: 8 : 63
Option 4: 9 : 85
Correct Answer: 8 : 63
Solution :
Given:
10 : 99 :: ? : ?
Like, 10 : 99→10
2
– 1 = 100 – 1 = 99
Let's check the options –
First option:
6 : 37; 6
2
– 1 = 36 – 1 = 35 ≠ 37
Second option:
7 : 45; 7
2
– 1 = 49 – 1 = 48 ≠ 45
Third option:
8 : 63; 8
2
– 1 = 64 – 1 = 63
Fourth option:
9 : 85; 9
2
– 1 = 81 – 1 = 80 ≠ 85
So, only the third option follows the same pattern as followed by the given pair. Hence, the third option is correct.
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