Another 42031

We divide the cake into 11 equal parts and eat 2 of them. Then we divide each part of the cake that is left into two more parts and eat another 2 of them. Which part of the cake did we not eat?

Correct answer:

x =  0.2727

Step-by-step explanation:

a=1112=111 11112=1111112=11112=1190.8182 b=a111=119111=1191=1180.7273  x=1b=1118=111 11118=1111118=11118=113=0.2727

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