Q1. Find the missing number in the pattern: (12, 8) → 80, (16, 7) → 207, (25, 21) → ?
Explanation
In each branch figure, the lower number equals the square of the left upper number minus the square of the right upper number. Thus, 12² - 8² = 144 - 64 = 80, and 16² - 7² = 256 - 49 = 207. Applying the same rule to the third figure gives 25² - 21² = 625 - 441 = 184. The numbers 525, 464 and 334 do not satisfy this square-difference pattern, so they are only distractors.
