The number of positive integers not exceeding 100 that are either odd or the square of an integer is ____

1. A63
2. B59
3. C55
4. D50

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Correct answer: C. 55

Explanation

Odd numbers up to 100: 50. Squares: 10. Odd squares (1, 9, 25, 49, 81): 5. Total = 50 + 10 − 5 = 55.