Stanley's mother owns a stationary shop. Stanley helped his mother pack 319 pencil cases into packets of 7. In the end, 25 packets of pencils cases were sold. How many pencils cases were not sold?

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asked Apr 9, 2020 18.0k views

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Stanley's mother owns a stationary shop. Stanley helped his mother pack 319 pencil cases into packets of 7. In the end, 25 packets of pencils cases were sold. How many pencils cases were not sold?

Mathematics
middle-school

Irvin Dominin asked

by Irvin Dominin

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They sold 25 packets, containing 7 pencils each. So, they sold a total of

$25\cdot 7=175$

pencils. This means that

319-175=144

pencils were not sold.

Gregorio answered Apr 14, 2020

by Gregorio

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