# CAT Practice : Functions

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Greater Integer Function

## Greatest Integer Function

Q.19: Find the value of x for which x[x] = 15
1. 3.5
2. 5
3. 6.1
4. None of these

Choice D. None of these

## Detailed Solution

Using similar approach as previous question, [x] = 3
=) x = 15/3 =) x = 5 which is not possible since $3 < x < 4$

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Functions.