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.
29 : 31 :: 19 : 23 :: 31 : ?
Option 1: 37
Option 2: 43
Option 3: 47
Option 4: 41
Correct Answer: 37
Solution :
Given:
29 : 31 :: 19 : 23 :: 31 : ?
Here, the second term is the immediate next prime number for the first term –
Like in, 29 : 31 → 31 is the immediate next prime number of 29.
And in, 19 : 23 → 23 is the immediate next prime number of 19.
Similarly, follow the same pattern for 31 : ? → 37 is the immediate next prime number of 31.
Therefore, 37 is the required missing term. Hence, the first option is correct.
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