Correct Answer - Option 3 : (29, 18, 242)
The logic followed here is:
(1st number - 2nd number)2 × 2 = 3rd number
For (24, 10, 392):
(24 - 10)2 × 2 = 14² × 2 = 196 × 2 = 392
Option 1: (26, 12, 369)
(26 - 12)2 × 2 = 142 × 2 = 196 × 2 = 392 ≠ 369
Option 2: (27, 15, 480)
(27 - 15)2 × 2 = 122 × 2 = 144 × 2 = 288 ≠ 480
Option 3: (29, 18, 242)
(29 - 18)2 × 2 =112 × 2 = 121 × 2 = 242
Option 4: (21, 18, 234)
(21 - 18)2 × 2 = 32 × 2 = 9 × 2 = 18 ≠ 234
Hence, the correct answer is "Option 3".