AMC / AIME · Floor and Ceiling · Hard

Floor and Ceiling: How many nonnegative lattice points satisfy math?

Integer parts.

Try the problem

How many nonnegative lattice points satisfy x+y≤7x+y\le7?

Hint and answer

Concept to use

Sums of floors.

Hint

Convert a floor or ceiling statement into its defining interval.

Answer

36

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