There is a certain relationship between the numbers on the left side of ::. Find the same relationship on the right side of ::.
225 : 257 :: 289 : ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 325
225 and 289 are both perfect squares (\(15^2\) and \(17^2\)), which points to a rule built on squares.
\(225=15^2\), and \(257=16^2+1\): the second number is the square of the next number, plus 1
\(289=17^2\), so the missing number is \(18^2+1=324+1=325\)