Question : Directions: Select the option that is related to the third term in the same way as the second term is related to the first term and the sixth term is related to the fifth term.
15 : 270 :: 21 : ? :: 18 : 378
Option 1: 520
Option 2: 504
Option 3: 502
Option 4: 540
Correct Answer: 504
Solution :
Given:
15 : 270 :: 21 : ? :: 18 : 378
Like, 15 : 270→(15)
2
+ (15 × 3) = 225 + 45 = 270
18 : 378→(18)
2
+ (18 × 3) = 324 + 54 = 378
Similarly, follow the same pattern for 21 : ?→(21)
2
+ (21 × 3) = 441 + 63 = 504
So, 504 is related to 21. Hence, the second option is correct.
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