Texas Instruments TI-73 Explorer User manual

12/17/01 © 2001 Texas Instruments
TI-73 / TI-83 Plus
Logic Ladder
How To…
Start and Quit the Application
Use On-screen Options and Menus
Complete the Factor Activity
Complete the Classic Activity
Delete the Application
More Information
Scoring
Error Recovery
TI

TI-73 / TI-83 Plus Logic Ladder Page 2
Important Information
Texas Instruments makes no warranty, either expressed or
implied, including but not limited to any implied warranties of
merchantability and fitness for a particular purpose, regarding
any programs or book materials and makes such materials
available solely on an “as-is” basis.
In no event shall Texas Instruments be liable to anyone for
special, collateral, incidental, or consequential damages in
connection with or arising out of the purchase or use of these
materials, and the sole and exclusive liability of Texas
Instruments, regardless of the form of action, shall not exceed
any applicable purchase price of this item or material. Moreover,
Texas Instruments shall not be liable for any claim of any kind
whatsoever against the use of these materials by any other
party.
Graphing product applications (Apps) are licensed. See the
terms of the license agreement for this product.
All trademarks are the property of their respective owners.

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What is the Logic Ladder Application?
The Logic Ladder application contains two activities:
•In Factor, you determine the prime factorization of numbers
by selecting the correct bases and exponents.
•In Classic, you order four to six different shapes, determining
the correct shapes in the correct order in less than nine
steps. Clues give you an idea of how close you are to the
correct sequence.
The Logic Ladder application is a concept application that TI
wants to share with our customers, educators, and students
before the product definition and testing are complete. It is an
alpha software version, and as such, it may contain
imperfections, or the coding may be incomplete.
TI invites your feedback concerning the functionality and
educational value of the Logic Ladder application. Please send
your comments and questions to [e-mail].

TI-73 / TI-83 Plus Logic Ladder Page 4
What You Need
Note
In this user guide, any information that pertains to the TI-83 Plus also
pertains to the TI-83 Plus Silver Edition, unless otherwise noted.
Hardware and software
Notes
TI-73 with version 1.50 or higher of the
Graph Explorer software
—or—
TI-83 Plus or TI-83 Plus Silver Edition
with version 1.13 or higher of the
operating system software
You can download a free copy of the
latest Graph Explorer or operating
system software from
education.ti.com/softwareupdates.
Follow the link to Operating Systems.
Computer with Windows® 95/98/2000,
Windows NT®, or Apple® Mac® OS 7.1
or higher installed
TI-GRAPH LINK™ computer-to-
calculator cable
If you do not have this cable, call your
distributor, or order the cable from
TI’s online store.
TI-GRAPH LINK software that is
compatible with the TI-73 or the
TI-83 Plus
—or—
TI™ Connect software (available at the
end of 2001). TI Connect works with all
supported models of TI graphing
calculators.
You can download free copies of
TI-GRAPH LINK and TI Connect from
education.ti.com/softwareupdates.
Follow the link to Connectivity
Software.

TI-73 / TI-83 Plus Logic Ladder Page 5
Where to Find Installation Instructions
Detailed instructions on installing this and other applications are
available at education.ti.com/guides. Follow the link to Flash
installation instructions.
Getting Help
The instructions in this guidebook are only for this application. If
you need help using the TI-73 or TI-83 Plus, refer to its
comprehensive guidebook at education.ti.com/guides.

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Starting and Quitting the Application
Starting the Application
1. Press
nto display the list of applications on your
calculator.
2. Select
LogicLdr. The application’s information screen is
displayed.
3. Press any key to continue. The developer’s screen is
displayed.
4. Press any key to continue. The main menu is displayed.
Quitting the Application
From the application’s main menu, select QUIT or press
\.

TI-73 / TI-83 Plus Logic Ladder Page 7
Navigating
Selecting Menu Items
To select an item from a menu, press hor `to highlight the
menu item, and then press ¯to select it.
Using On-Screen Options
The main activity screens display a GIVE UP option in the bottom
right corner of the screen. To select this option, press the
graphing key directly below the option.
RSTUV
Press Vto select
GIVE UP.

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Scoring
The Logic Ladder application tracks the number of wins and
losses you have accumulated for both of the activities. Scores for
the activities are combined. For example, if you completed the
Factor activity giving five correct answers and two incorrect
answers and also completed the Classic activity giving three
correct answers and one incorrect answer, the score would show
WINS: 8 LOSSES: 3.
Viewing and Resetting the Score
You can view your score at any time by returning to the MAIN
MENU and selecting VIEW STATS.
To reset the score, return to the MAIN MENU, and select
CLEAR STATS.

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Completing the Factor Activity
The Factor activity lets students practice factoring numbers into
the product of primes.
In the Factor activity, a random number with the prime
factorization of the form AXgBY is generated. A and B are the
prime bases; X and Y are the powers of the prime bases. You
determine which values for A, B, X, and Y create the correct
prime factorization of the number.
1. From the
MAIN MENU, select FACTOR. The FACTOR menu is
displayed.
2. Select
START
to display the first number to factor. The arrow
is at A. The default selections for A,X,B, and Y are
highlighted.
A random number is
generated whose prime
factorization is of the form
AXgBY. Your number will
be different than this one.

TI-73 / TI-83 Plus Logic Ladder Page 10
5. Use the arrow keys (_and a) to highlight the value that you
want to select for A.
Tip
Don’t press ¯yet! Pressing ¯submits your answer. You
must select values for all of the variables before you press
¯.
6. Press
hto move the arrow to the exponent X, and then use
the arrow keys (_, a) to highlight the value that you want to
select for the exponent of A, X.
7. Repeat step 4 to select values for Band Y.
8. After you have selected all four values, press ¯.
Tip
You can move the arrow back to any base or exponent and
change its value before you press ¯.

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If your answer is correct…
If your answer is incorrect…
Your cumulative score and the
correct answer are displayed.
To continue the activity, press
¯.
To quit the activity, press \
to return to the MAIN MENU.
You have one more opportunity to
solve the problem. Select
TRY AGAIN to return to the problem.
To move on to another problem,
select GIVE UP.
When you select GIVE UP, or if you
answer a problem incorrectly two
times, your cumulative score and
the correct answer are displayed.
Press any key to return to the MAIN
MENU.

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Completing the Classic Activity
The Classic activity lets students practice logic and pattern
recognition skills to determine the order of a set of geometric
shapes in nine or fewer tries. After each try, clues indicate the
number of correct shapes and the number of shapes that are in
the correct order. Activity settings control the number of shapes
(4 – 6) and whether shapes can be repeated.
1. From the
MAIN MENU, select CLASSIC. The CLASSIC menu is
displayed.
Tip
•The default settings are
•four shapes
•shapes can be repeated
2. Select
START to display the first problem. The first shape is
highlighted.

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3. Press
_or auntil the shape that you want to select is
displayed.
4. Press
hto move to the second shape or press ¯to
submit your answer and display clues about the correct
answer.
Note
After you press ¯, you have completed that try.
A line indicates that
one shape is
correct, but is not in
the correct location.
A solid square
indicates that one
shape is correct and
that shape is in the
correct location.
The activity can have
four, five, or six shapes.
The shapes displayed at
the top of the screen are
those that could be part
of the solution.

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5. Use your logic skills to determine the pattern of the shapes in
as few tries as possible.
Note
You can use up to nine tries to determine the shape pattern.
When you determine the correct shape pattern, the clues
show that all of the shapes are in the correct location, and
GOOD JOB! is displayed at the bottom of the screen.
6. Press any key to display your cumulative score.
Notice that the order
of the clues is
insignificant. These
two squares do not
indicate that the first
two shapes are
correct, but that two of
the four shapes are
correct and are in the
correct location.

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If you are not able to determine the shape pattern in nine or
fewer tries, a screen is displayed that shows your cumulative
score and the correct answer.
7. From the scoring screen, press any key to return to the MAIN
MENU.

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Changing the Classic Activity Settings
You can change the number of shapes the activity uses and
determine whether shapes can be repeated. The default values
are 4and YES (4 shapes; shapes can be repeated).
To set the number of shapes:
1. From the
CLASSIC menu, select PIECES. The display changes
to 4 5 6.
2. Use the arrow keys (_,a) to move the cursor to the number
of shapes that you want the activity to include, and then
press ¯. The display changes back to PIECES.

TI-73 / TI-83 Plus Logic Ladder Page 17
To determine whether shapes can be repeated:
1. From the
CLASSIC menu, select REPEAT. The display
changes to YES NO.
2. Move the cursor to YES if you want to repeat shapes, or
move the cursor to NO if you do not want to repeat shapes,
and then press ¯. The display changes back to REPEAT.

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Deleting the Application from Your Calculator
TI-73
1. Press
\/to display the MEMORY menu.
2. Select
Delete.
3. Select
Apps.
4. Move the cursor to LogicLdr.
5. Press
¯. A confirmation message is displayed.
6. Select
Yes to delete the application.
TI-83 Plus
1. Press
\/to display the MEMORY menu.
2. Select
Mem Mgmt/Del.
3. Select Apps.
4. Move the cursor to LogicLdr.
5. Press
^. A confirmation message is displayed.
6. Select
Yes to delete the application.

TI-73 / TI-83 Plus Logic Ladder Page 19
Installation Error Messages
Low Battery
Do not attempt to download a Flash application if the low-battery
message appears on the home screen. Low battery indication is
shown on the initial screen. If you receive this error during an
installation, change the batteries before trying again.
Invalid Signature or Certificate
Either this calculator does not have a certificate to run the
application, or electrical interference caused a link to fail. Try to
install the application again.
Error in Xmit
This problem is usually associated with the unit-to-unit cable and
its connection between the calculators. Make sure the cable is
firmly inserted in the link port of each calculator.

TI-73 / TI-83 Plus Logic Ladder Page 20
Communication Error
This error indicates that the TI™ Connect software (“Unable to
communicate with device”) or TI-GRAPH LINK™ software (“Link
Transmission Error”) is unable to communicate with the
calculator. The problem is usually associated with the
TI-GRAPH LINK cable and its connection to the calculator or to
the computer.
•Make sure the cable is firmly inserted in the calculator link
port and the computer.
•Verify that the correct cable type is selected in the software
link settings.
•Verify that the correct communications port (Com Port) is
selected in the software link settings.
If this does not correct the problem, try a different
TI-GRAPH LINK cable and restart your computer.