Numbers

3-84 Problem Solving!

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The perimeter of square BCDE is 16 units.  What is the perimeter of the shaded area in the figure below?

 

PerimeterBCDE.gif (2243 bytes)

 

units.

 

The target below has rings worth 20 points, 30 points, and a bull's-eye worth 50 points.  Jenny shot five arrows at the target.  Two of her arrows hit the 20 point ring, one of her arrows hit the 30 point ring, and two of her arrows hit the bull's-eye.   How many points did Jenny score?

points.

 

Target.gif (1735 bytes)

 

Counting numbers are the numbers 1, 2, 3, 4, 5, 6, 7, ...  How many counting numbers 1 through 75 have the digit 5 in the number?

counting numbers.

 

Look at the figure below.  How many times does the letter Y appear in the figure?

 

YYYYYYYYYY
YYYYYYYYYYYY
YYYYYYYYYY
YYYYYYYYYYYY
YYYYYYYYYY
YYYYYYYYYYYY
YYYYYYYYYY
YYYYYYYYYYYY

 

times.

 

Ashley shot 3 arrows at the target below.  All three arrows hit the target.   The bull's-eye has a score of 50 points.  Which of the following scores is not possible?  150?  140? Or 100?

 

Target.gif (1735 bytes)

 

The score of .

 

 

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