NCERT Textbook: Fun with Logic

# NCERT Textbook: Fun with Logic - Information Technology for Class 9

``` Page 1

Jason is the sports captain of his school. He was thrilled
to receive the Chief Minister’s scholarship for his
outstanding performance in sports. But his scholarship
amount has to be credited to his bank account and Jason
does not have a savings bank account. He does not even
know how to open a bank account. So he approaches
a bank in his locality and the bank employee at the
helpdesk gives him instructions to complete the task as
given below.
1. Take the account opening form from the counter.
2. Fill the details in the form carefully.
3. Put your signature at the designated place on the
form.
4. Attach a copy of the photo identity card.
5. Submit the form at the counter with a minimum
deposit.
After understanding the process to open a bank account,
Jason gets on to work. When he went to complete the
final step, which was to submit the form, the clerk
informed him that his account could not be opened.
What would have gone wrong? What reasons can you
think of?
_____________________________
_____________________________
_____________________________
Fun with Logic
Chapter
8
Chapter 8.indd   102 7/22/2020   12:36:46 PM
Rationalised 2023-24
Page 2

Jason is the sports captain of his school. He was thrilled
to receive the Chief Minister’s scholarship for his
outstanding performance in sports. But his scholarship
amount has to be credited to his bank account and Jason
does not have a savings bank account. He does not even
know how to open a bank account. So he approaches
a bank in his locality and the bank employee at the
helpdesk gives him instructions to complete the task as
given below.
1. Take the account opening form from the counter.
2. Fill the details in the form carefully.
3. Put your signature at the designated place on the
form.
4. Attach a copy of the photo identity card.
5. Submit the form at the counter with a minimum
deposit.
After understanding the process to open a bank account,
Jason gets on to work. When he went to complete the
final step, which was to submit the form, the clerk
informed him that his account could not be opened.
What would have gone wrong? What reasons can you
think of?
_____________________________
_____________________________
_____________________________
Fun with Logic
Chapter
8
Chapter 8.indd   102 7/22/2020   12:36:46 PM
Rationalised 2023-24
Fun with Logic 103
Once again Jason checked the steps to open the bank
account. It was then that he realized that he had missed
Step no 3 which was to put signature at the designated
place on the form and that was why the task of opening
the bank account could not be completed. Thereafter,
he put his signature and submitted his form again. His
account was finally successfully opened.
Have you ever faced such a problem while completing
the correct sequence of steps? Will you get the desired
result?
Activity 1
On the eve of the Independence day, you want to listen to
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
Are you able to tune in to listen to the Prime Minister’s
address? What happens if you interchange any of the
steps? Are you still able to get the desired result?
By now, you must have understood the importance of
instructions and the sequence of instructions to
to get the desired output, you have to mention each
instruction clearly, sequentially and logically, as
shown in Fig. 8.1. So to achieve a task, the steps are
listed below.
1. Clearly identify the output that you want.
2. Analyse the instructions required to find a solution
to get the desired output.
3. Finalise and give instructions in the proper
sequence.
4. Verify whether the output produced is as desired
by you in Step 1.
Chapter 8.indd   103 7/22/2020   12:36:46 PM
Rationalised 2023-24
Page 3

Jason is the sports captain of his school. He was thrilled
to receive the Chief Minister’s scholarship for his
outstanding performance in sports. But his scholarship
amount has to be credited to his bank account and Jason
does not have a savings bank account. He does not even
know how to open a bank account. So he approaches
a bank in his locality and the bank employee at the
helpdesk gives him instructions to complete the task as
given below.
1. Take the account opening form from the counter.
2. Fill the details in the form carefully.
3. Put your signature at the designated place on the
form.
4. Attach a copy of the photo identity card.
5. Submit the form at the counter with a minimum
deposit.
After understanding the process to open a bank account,
Jason gets on to work. When he went to complete the
final step, which was to submit the form, the clerk
informed him that his account could not be opened.
What would have gone wrong? What reasons can you
think of?
_____________________________
_____________________________
_____________________________
Fun with Logic
Chapter
8
Chapter 8.indd   102 7/22/2020   12:36:46 PM
Rationalised 2023-24
Fun with Logic 103
Once again Jason checked the steps to open the bank
account. It was then that he realized that he had missed
Step no 3 which was to put signature at the designated
place on the form and that was why the task of opening
the bank account could not be completed. Thereafter,
he put his signature and submitted his form again. His
account was finally successfully opened.
Have you ever faced such a problem while completing
the correct sequence of steps? Will you get the desired
result?
Activity 1
On the eve of the Independence day, you want to listen to
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
Are you able to tune in to listen to the Prime Minister’s
address? What happens if you interchange any of the
steps? Are you still able to get the desired result?
By now, you must have understood the importance of
instructions and the sequence of instructions to
to get the desired output, you have to mention each
instruction clearly, sequentially and logically, as
shown in Fig. 8.1. So to achieve a task, the steps are
listed below.
1. Clearly identify the output that you want.
2. Analyse the instructions required to find a solution
to get the desired output.
3. Finalise and give instructions in the proper
sequence.
4. Verify whether the output produced is as desired
by you in Step 1.
Chapter 8.indd   103 7/22/2020   12:36:46 PM
Rationalised 2023-24
ICT Tex Tbook — Class Ix 104
Identify the Output • Do you clearly know what output has to be produced?
Analyse
• Do you have multiple solutions?
• Which is the best possible option?
• Have you identified the correct sequence of
instructions?
Finalise
Instructions
• Give the instructions in logical sequence.
Verify the Output • Is the output same as you had identified in Step 1?
Fig. 8.1: Steps to complete a task
Consider a situation where the Twirly cat has lost the
way to her house as shown in Fig. 8.2.
Fig. 8.2: Twirly cat finding its way
What instructions would you give her to help her reach
the house? Write them in the space provided below:
Chapter 8.indd   104 7/22/2020   12:36:47 PM
Rationalised 2023-24
Page 4

Jason is the sports captain of his school. He was thrilled
to receive the Chief Minister’s scholarship for his
outstanding performance in sports. But his scholarship
amount has to be credited to his bank account and Jason
does not have a savings bank account. He does not even
know how to open a bank account. So he approaches
a bank in his locality and the bank employee at the
helpdesk gives him instructions to complete the task as
given below.
1. Take the account opening form from the counter.
2. Fill the details in the form carefully.
3. Put your signature at the designated place on the
form.
4. Attach a copy of the photo identity card.
5. Submit the form at the counter with a minimum
deposit.
After understanding the process to open a bank account,
Jason gets on to work. When he went to complete the
final step, which was to submit the form, the clerk
informed him that his account could not be opened.
What would have gone wrong? What reasons can you
think of?
_____________________________
_____________________________
_____________________________
Fun with Logic
Chapter
8
Chapter 8.indd   102 7/22/2020   12:36:46 PM
Rationalised 2023-24
Fun with Logic 103
Once again Jason checked the steps to open the bank
account. It was then that he realized that he had missed
Step no 3 which was to put signature at the designated
place on the form and that was why the task of opening
the bank account could not be completed. Thereafter,
he put his signature and submitted his form again. His
account was finally successfully opened.
Have you ever faced such a problem while completing
the correct sequence of steps? Will you get the desired
result?
Activity 1
On the eve of the Independence day, you want to listen to
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
Are you able to tune in to listen to the Prime Minister’s
address? What happens if you interchange any of the
steps? Are you still able to get the desired result?
By now, you must have understood the importance of
instructions and the sequence of instructions to
to get the desired output, you have to mention each
instruction clearly, sequentially and logically, as
shown in Fig. 8.1. So to achieve a task, the steps are
listed below.
1. Clearly identify the output that you want.
2. Analyse the instructions required to find a solution
to get the desired output.
3. Finalise and give instructions in the proper
sequence.
4. Verify whether the output produced is as desired
by you in Step 1.
Chapter 8.indd   103 7/22/2020   12:36:46 PM
Rationalised 2023-24
ICT Tex Tbook — Class Ix 104
Identify the Output • Do you clearly know what output has to be produced?
Analyse
• Do you have multiple solutions?
• Which is the best possible option?
• Have you identified the correct sequence of
instructions?
Finalise
Instructions
• Give the instructions in logical sequence.
Verify the Output • Is the output same as you had identified in Step 1?
Fig. 8.1: Steps to complete a task
Consider a situation where the Twirly cat has lost the
way to her house as shown in Fig. 8.2.
Fig. 8.2: Twirly cat finding its way
What instructions would you give her to help her reach
the house? Write them in the space provided below:
Chapter 8.indd   104 7/22/2020   12:36:47 PM
Rationalised 2023-24
Fun with Logic 105
Scratch is a free
programming
language developed
by MIT in the
year 2005.
Step 1: Move forward by 10 steps.
Step 2: Turn right by 90 degrees
Have you given the right instructions? Will Twirly cat
reach its home? Can you check the given instructions
using any software application or tool? Yes, you can
do so by using the Scratch application. Using this
application you can create your own stories, games and
various other animations using simple drag and drop
instructions.
Animations in Scratch can be created offline as well as
online mode. As it is an open source software you can
your computer and then use it. You can also create and
share your animations online using the above URL.
On opening Scratch, you see the interface as shown in
Fig. 8.3. Each object on the scratch window is called a
sprite. This object can be any person, an animal, an
automobile, a building or even text.
After learning about the Scratch interface let us now
verify the steps that would take out Twirly cat home. In
Fig. 8.3: Scratch Interface
Chapter 8.indd   105 7/22/2020   12:36:48 PM
Rationalised 2023-24
Page 5

Jason is the sports captain of his school. He was thrilled
to receive the Chief Minister’s scholarship for his
outstanding performance in sports. But his scholarship
amount has to be credited to his bank account and Jason
does not have a savings bank account. He does not even
know how to open a bank account. So he approaches
a bank in his locality and the bank employee at the
helpdesk gives him instructions to complete the task as
given below.
1. Take the account opening form from the counter.
2. Fill the details in the form carefully.
3. Put your signature at the designated place on the
form.
4. Attach a copy of the photo identity card.
5. Submit the form at the counter with a minimum
deposit.
After understanding the process to open a bank account,
Jason gets on to work. When he went to complete the
final step, which was to submit the form, the clerk
informed him that his account could not be opened.
What would have gone wrong? What reasons can you
think of?
_____________________________
_____________________________
_____________________________
Fun with Logic
Chapter
8
Chapter 8.indd   102 7/22/2020   12:36:46 PM
Rationalised 2023-24
Fun with Logic 103
Once again Jason checked the steps to open the bank
account. It was then that he realized that he had missed
Step no 3 which was to put signature at the designated
place on the form and that was why the task of opening
the bank account could not be completed. Thereafter,
he put his signature and submitted his form again. His
account was finally successfully opened.
Have you ever faced such a problem while completing
the correct sequence of steps? Will you get the desired
result?
Activity 1
On the eve of the Independence day, you want to listen to
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________
Are you able to tune in to listen to the Prime Minister’s
address? What happens if you interchange any of the
steps? Are you still able to get the desired result?
By now, you must have understood the importance of
instructions and the sequence of instructions to
to get the desired output, you have to mention each
instruction clearly, sequentially and logically, as
shown in Fig. 8.1. So to achieve a task, the steps are
listed below.
1. Clearly identify the output that you want.
2. Analyse the instructions required to find a solution
to get the desired output.
3. Finalise and give instructions in the proper
sequence.
4. Verify whether the output produced is as desired
by you in Step 1.
Chapter 8.indd   103 7/22/2020   12:36:46 PM
Rationalised 2023-24
ICT Tex Tbook — Class Ix 104
Identify the Output • Do you clearly know what output has to be produced?
Analyse
• Do you have multiple solutions?
• Which is the best possible option?
• Have you identified the correct sequence of
instructions?
Finalise
Instructions
• Give the instructions in logical sequence.
Verify the Output • Is the output same as you had identified in Step 1?
Fig. 8.1: Steps to complete a task
Consider a situation where the Twirly cat has lost the
way to her house as shown in Fig. 8.2.
Fig. 8.2: Twirly cat finding its way
What instructions would you give her to help her reach
the house? Write them in the space provided below:
Chapter 8.indd   104 7/22/2020   12:36:47 PM
Rationalised 2023-24
Fun with Logic 105
Scratch is a free
programming
language developed
by MIT in the
year 2005.
Step 1: Move forward by 10 steps.
Step 2: Turn right by 90 degrees
Have you given the right instructions? Will Twirly cat
reach its home? Can you check the given instructions
using any software application or tool? Yes, you can
do so by using the Scratch application. Using this
application you can create your own stories, games and
various other animations using simple drag and drop
instructions.
Animations in Scratch can be created offline as well as
online mode. As it is an open source software you can
your computer and then use it. You can also create and
share your animations online using the above URL.
On opening Scratch, you see the interface as shown in
Fig. 8.3. Each object on the scratch window is called a
sprite. This object can be any person, an animal, an
automobile, a building or even text.
After learning about the Scratch interface let us now
verify the steps that would take out Twirly cat home. In
Fig. 8.3: Scratch Interface
Chapter 8.indd   105 7/22/2020   12:36:48 PM
Rationalised 2023-24
ICT Tex Tbook — Class Ix 106
the Scratch window, our Twirly cat will be called a cat
sprite. To make the sprite move on a specific path, you
have to choose the appropriate instruction block and
drag it to the script area. Make sure you choose the
instructions in a logical sequence. When the script is
complete, you need to execute it to see the output on
the stage (Refer Fig. 8.4).
Chapter 8.indd   106 7/22/2020   12:36:50 PM
Rationalised 2023-24
```

8 videos|16 docs

## Information Technology for Class 9

8 videos|16 docs

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