Pennies

800 pennies have the same value as 100 ducats. 100 pennies have the same value as 250 tolars. How many ducats has the same value as 100 tolars?

Correct answer:

x =  5

Step-by-step explanation:

$x=100\cdot (100\mathrm{/}250)\cdot (100\mathrm{/}800)=5$

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