MathDB
2012 preRMO p15, [x/5] =[x/7], with floor function

Source:

June 17, 2019
algebrafloor functionfunction

Problem Statement

How many non-negative integral values of xx satisfy the equation ⌊x5⌋=⌊x7⌋ \lfloor \frac{x}{5}\rfloor = \lfloor \frac{x}{7}\rfloor
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