Bruce likes 324 but not 325. he likes 2500 but not 2400. he likes 121 but not 122. which does he like?

All of Bruce's "likes" are squares: 324 = 18², 2500 = 50², 121 = 11²

Bruce only likes numbers that are perfect squares.

Bruce likes Perfect Square numbers.

Step-by-step 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.