Exhibition

The teacher paid for 280 Kč for 4.A students for admission to the exhibition. How many students were on the exhibition?

Correct result:

n =  28

Solution:

D(280)={1,2,4,5,7,8,10,14,20,28,35,40,56,70,140,280} 15≤n≤39 n=20∣28∣35

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