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Question 4:
Fred is 42
years old and reads 3 books a week. Jim is 3 years
older and reads 5 books a week. Joan is 35 and
reads 18 books a month. The library contains 3792
books. How long is it before all the books could
have been read by someone?
Better read it again. There's
some confusing information here. See what the
answer needs - Time to read all the books. This is
an example of 'too many facts, many that you don't
need'.
Tip: Check that all the time
periods are the same - they aren't - two are a
week, one is a month.
Let 'x' equal
number of years to read all the books.
........................Fred........Jim...........Joan
x = 3792
÷ (3x52) + (5x52) + (18x12)
x = 3792
÷ (156 + 260 + 216)
x = 3792
÷ 632
x =
Answer to
question 4:
'A' - 4
years
'B' -
5
years
'C'
-
6
years
'D'
-
7
years
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