Re: general gre math problem

"Ted Hwa" <hwatheod@xxxxxxxxxxxxxxxxxx> wrote in message
news:en7pbn$8ac$1@xxxxxxxxxxxxxxxxxxxx

Suppose instead the lane were 30 feet long. Then how many saplings are
needed? That should help you see the reasoning.

Additional hint: This type of problem comes up SO often in integer
arithmetic.

One might say, if L is the length of the lane, that the number of saplings
required is:

floor(L/30) + 1

And of the two terms above ... guess which one you're not seeing?

Additional hint #2: If all else fails, get a roll of quarters and 9 decks
of playing cards. Each card can be one foot of length, and each quarter can
be a sapling. For approximately $35 or less, you can figure out what you're
not seeing ... And of the $35, you can get $10 back (the roll of quarters
can still be used as money).


.