Cash back

After a trip 24 students have left more than 650 but less than 690 CZK (Kc). How much each student receives return when the amount is divisible by the number of pupils?

Correct result:

x =  28

Solution:

$$\begin{gathered} 650\mathrm{/}24<x<690\mathrm{/}24 \\ 27.0833333333<x<28.75 \\ x\in N \\ x=28 \end{gathered}$$

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