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Data Sufficiency (DS) | Re: If [x] denotes the greatest integer less than or equal to x

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Hi,

I was able to get this question right but I want to confirm if my concepts/understanding is correct for the four different situations:

If[x] is let's say,[4.3] , and the question said:

1.[x] is the greatest integer that is less than or equal to x, this would mean[4.3] rounds down to[4]

2.[x] is the greatest integer that is more than or equal to x, this would mean[4.3] rounds up to[5]

3.[x] is the least integer that is less than or equal to x, this would mean[4.3] rounds down to[4]

4.[x] is the least integer that is more
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