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Question 5:
John has half
as many cakes as Bill. Tony has 5 fewer cakes than
Harry. Harry has 3 time the number of cakes that
John has. In total they have 40 cakes. How many has
each.
Let's put down what everyone
has.
Remember the
one we don't know anything about is the one we call
'x'.
Bill = y
.............((We're
using 'y' so as not to confuse with the multiple
sign)
John = y÷2
Harry = 3 times
y÷2
Tony = (3 times y÷2) -
5
The equation is:
The
total.....Bill
..John...Harry...Tony
........40
=
........y
+ y÷2 + (3y÷2) + (3y÷2) -
5
........80
=
........2y
+ y + 3y + 3y -
10...........MMultiply
both sides by 2
........80
=
........9y
- 10
........90
=
........9y
.........y
=
........10
Click on the answer below you
believe is the correct one
Answer to
question 4:
'A' -
Bill 10, John 5, Harry 15, Tony 10
'B'
-
Bill
12, John 6, Harry 14, Tony 12
'C' -
Bill
12, John 6, Harry 16, Tony 10
'D'
-
Bill
15, John 5, Harry 10, Tony 12
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