In the following question, four options are given. Out of these, three are alike in a particular way, but the remaining one is different. Find the odd one out.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 26:572
In three of the pairs the second number is the first multiplied by the number two less than itself, that is n × (n − 2): 13 × 11 = 143, 18 × 16 = 288 and 23 × 21 = 483.
Applying the same rule to 26 gives 26 × 24 = 624, not 572 (which is 26 × 22). So 26:572 breaks the pattern and is the odd one out.