



 
Hi Lois, Suppose he has $n$ boards, each $l$ units long. He cuts off $\large \frac35$ of each board so the remaining pieces are each $\large \frac25 \normalsize \times l$ units long. Hence the total length of the remaining pieces is $n \times \large \frac25 \normalsize \times l$ units. But this will make 4 boards, each the length of the original boards so this length is $4 \times l.$ Solve for $n.$ Penny  


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