12-144, 17-289, 15-195, 21-441 - which is the odd pair?
Show answer & explanation
Correct answer: C
Explanation
The pattern followed in the given pairs is that the second number is the square of the first number:
• 12 : 122 = 144
• 17 : 172 = 289
• 21 : 212 = 441
• 15 : 152 = 225 ≠ 195
Therefore, 15-195 is the odd pair.