Which pair is odd one out?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 33 : 1097
In each pair, the second number is the square of the first number plus 4.
17 : 293 — \(17^2+4=289+4=293\)
19 : 365 — \(19^2+4=361+4=365\)
21 : 445 — \(21^2+4=441+4=445\)
33 : 1097 — \(33^2+4=1089+4=1093\), not 1097, so 33 : 1097 is the odd one out.