Question : Directions: 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.
12 : 33 :: 31 : 71 :: 79 : ?
Option 1: 167
Option 2: 179
Option 3: 138
Option 4: 182
Correct Answer: 167
Solution :
Given:
12 : 33 :: 31 : 71 :: 79 : ?
Multiply the first number by 2 and add 9 in the resultant, to obtain the second number –
Like in, 12 : 33 → (12 × 2) + 9 = 33
And in, 31 : 71 → (31 × 2) + 9 = 71
Similarly, follow the same pattern for 79 : ? → (79 × 2) + 9 = 167
So, the required missing number is 167. Hence, the first option is correct.
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