For any real number x x x , let ⌊ x ⌋ \lfloor x \rfloor ⌊ x ⌋ be the largest integer less than or equal to x x x . If ∑ n = 1 N ⌊ 1 5 + n 25 ⌋ = 25 , ...

Question

For any real number

xx
, let
x\lfloor x \rfloor
be the largest integer less than or equal to
xx
. If

n=1N15+n25=25,\sum_{n=1}^{N} \left\lfloor \frac{1}{5} + \frac{n}{25} \right\rfloor = 25,
then
NN
is:

Answer Format

Enter your answer as an integer value

floor functionsummationlogical reasoningcat 2022

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