[tex]\bf \cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}+\cfrac{1}{6}\implies \cfrac{10}{6}\implies \cfrac{\underline{2}\cdot 5}{\underline{2}\cdot 3}\implies \boxed{\cfrac{5}{3}}\\\\
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\cfrac{1}{3}+\cfrac{1}{3}+\cfrac{1}{3}+\cfrac{1}{3}+\cfrac{1}{3}\implies \boxed{\cfrac{5}{3}}[/tex]
one can also say that, 1/6 is really half of 1/3, and therefore, you need twice as many to equate it.