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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.
121 : 145 : : 49 : 65 : : 169 : ?

Option 1: 193

Option 2: 196

Option 3: 198

Option 4: 197


Team Careers360 17th Jan, 2024
Answer (1)
Team Careers360 23rd Jan, 2024

Correct Answer: 197


Solution : Given:
121 : 145 : : 49 : 65 : : 169 : ?

Determine the square root of the first term and add 1 to the square of the immediate next number of square root of the first term, to get the second term –
Like in, 121 : 145 → 11 2 = 121; (11 + 1) 2 + 1 = 145
And in,  49 : 65 → 7 2 = 49; (7 + 1) 2 + 1 = 65
Similarly, follow the same pattern for 169 : ? → 13 2 = 169, (13 + 1) 2 + 1 = 197

Therefore, 197 is related to 169. Hence, the fourth option is correct.

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