Numbers 

How many different positive integral values, less than 1000, y = x[x] can take where x is a positive real number.

Note:- [x] is greatest integer less than or equal to x
For eg.  [3.5] = 3, as 3 is the largest integer less than or equal to 3.5
Similarly [4] = 4, [3.99] = 3
1. 31
2. 496
3. 30
4. None of these

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