Answer:
Bruce likes Perfect Square numbers.
Explanation:
Given numbers are 324 , 325 , 2500 , 2400 , 121 and 122.
Bruce like 324 instead of 325.
Bruce like 2500 instead of 2400.
Bruce like 121 instead of 122.
We know there are perfect square numbers means numbers whose roots are whole number or numbers which obtained by multiplying them with itself.
Here all numbers that Bruce likes are Perfect Square numbers.
Square root of 324 = 18 or 18² = 324
Square root of 2500 = 50 or 50² = 2500
Square root of 121 = 11 or 11² = 121
Therefore, Bruce likes Perfect Square numbers.