Pancake math problem

It will take at least (14) minutes.

The first two cakes are fried in pairs for 4 minutes, the third and fourth cakes for 2 minutes, the fifth and sixth cakes for 2 minutes, the third and seventh cakes for 2 minutes. *** 14 minutes.

Tuition of Hefei Run 'an Public School

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Point out the answers to the first volume of fifth grade mathematics

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Fei Sumei, a retired teacher of Chunhua Junior High School in Jiangning District.