Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8th

# Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Mathematics Answers Guide chapter 7 - Information Processing [Latest edition]

## Chapter 7: Information Processing

Exercise 7.1Exercise 7.2Exercise 7.3Exercise 7.4
Exercise 7.1 [Pages 245 - 247]

### Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Mathematics Answers Guide Chapter 7 Information ProcessingExercise 7.1 [Pages 245 - 247]

Exercise 7.1 | Q 1 | Page 245

You want to have an ice cream or a cake. There are three flavours (chocolate, strawberry and vanilla) in ice creams, and two flavours (orange and red velvet) in the cakes. In how many possible ways can you choose an ice cream or a cake?

Exercise 7.1 | Q 2 | Page 245

Shanthi has 5 churidar sets and 4 frocks. In how many possible ways, can she wear either a churidar or a frock?

Exercise 7.1 | Q 3 | Page 246

In a Higher Secondary School, the following groups are available in XI standard

I. Science Group:
(i) Physics, Chemistry, Biology and Mathematics
(ii) Physics, Chemistry, Mathematics and Computer Science.
(iii) Physics, Chemistry, Biology and Home Science

II. Arts Group:
(i) Accountancy, Commerce, Economics and Business Maths
(ii) Accountancy, Commerce, Economics and Computer Science
(iii) History, Geography, Economics and Commerce

III. Vocational Group:
(i) Biology, Nursing Theory, Nursing Practical I and Nursing Practical II
(ii) Home Science, Textiles and Dress Designing Theory, Textiles and Dress Designing Practical I and Textiles and Dress Designing Practical Il

In how many possible ways, can a student choose a group?

Exercise 7.1 | Q 4 | Page 246

If you have 2 school bags and 3 water bottles then, in how many different ways can you choose each one of them, while going to school?

Exercise 7.1 | Q 5 | Page 246

Roll numbers are created with a letter followed by 3 digits in it, from the letters A, B, C, D and E and any 3 digits from 0 to 9. In how many possible ways can the roll numbers be generated? (except A000, B000, C000, D000 and E000)

Exercise 7.1 | Q 6 | Page 246

A safety locker in a jewel shop requires a 4 digit unique code. The code has the digits from 0 to 9. How many unique codes are possible?

Exercise 7.1 | Q 7 | Page 246

An examination paper has 3 sections, each with five questions and students are instructed to answer one question from each section. In how many different ways of can the questions be answered?

Exercise 7.1 | Q 8 | Page 246

The given spinner is spun twice and the two numbers got are used to form a 2 digit number. How many different 2 digits numbers are possible?

Exercise 7.1 | Q 9 | Page 246

Ramya wants to paint a pattern in her living room wall with minimum budget. Help her to colour the pattern with 2 colours but make sure that no two adjacent boxes are the same colour. The pattern is shown in the picture.

Exercise 7.1 | Q 10 | Page 247

Colour the regions in the maps with few colours as possible but make sure that no two adjacent countries are of the same colour

#### Objective Type Questions

Exercise 7.1 | Q 11 | Page 247

In a class there are 26 boys and 15 girls. The teacher wants to select a boy or a girl to represent a quiz competition. In how many ways can the teacher make this selection?

• 41

• 26

• 15

• 390

Exercise 7.1 | Q 12 | Page 247

How many outcomes can you get when you toss three coins once?

• 6

• 8

• 3

• 2

Exercise 7.1 | Q 13 | Page 247

In how many ways can you answer 3 multiple choice questions, with the choices A, B, C and D?

• 4

• 3

• 12

• 64

Exercise 7.1 | Q 14 | Page 247

How many 2 digit numbers contain the number 7?

• 10

• 18

• 19

• 20

Exercise 7.2 [Pages 253 - 254]

### Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Mathematics Answers Guide Chapter 7 Information ProcessingExercise 7.2 [Pages 253 - 254]

Exercise 7.2 | Q 1. (i) | Page 253

Using repeated division method, find the HCF of the following:

455 and 26

Exercise 7.2 | Q 1. (ii) | Page 253

Using repeated division method, find the HCF of the following:

392 and 256

Exercise 7.2 | Q 1. (iii) | Page 253

Using repeated division method, find the HCF of the following:

6765 and 610

Exercise 7.2 | Q 1. (iv) | Page 253

Using repeated division method, find the HCF of the following:

184, 230 and 276

Exercise 7.2 | Q 2. (i) | Page 253

Using repeated subtraction method, find the HCF of the following:

42 and 70

Exercise 7.2 | Q 2. (ii) | Page 253

Using repeated subtraction method, find the HCF of the following:

36 and 80

Exercise 7.2 | Q 2. (iii) | Page 253

Using repeated subtraction method, find the HCF of the following:

280 and 420

Exercise 7.2 | Q 2. (iv) | Page 253

Using repeated subtraction method, find the HCF of the following:

1014 and 654

Exercise 7.2 | Q 3. (i) | Page 253

Do the given problems by repeated subtraction method and verify the result

56 and 12

Exercise 7.2 | Q 3. (ii) | Page 253

Do the given problems by repeated subtraction method and verify the result

320, 120 and 95

Exercise 7.2 | Q 4 | Page 254

Kalai wants to cut identical squares as big as she can, from a piece of paper measuring 168 mm and by 196 mm. What is the length of the side of the biggest square? (To find HCF using repeated subtraction method)

#### Objective Type Questions

Exercise 7.2 | Q 5 | Page 254

What is the eleventh Fibonacci number?

• 55

• 77

• 89

• 144

Exercise 7.2 | Q 6 | Page 254

If F(n) is a Fibonacci number and n = 8, which of the following is true?

• F(8) = F(9) + F(10)

• F(8) = F(7) + F(6)

• F(8) = F(10) × F(9)

• F(8) = F(7) – F(6)

Exercise 7.2 | Q 7 | Page 254

Every 3rd number of the Fibonacci sequence is a multiple of _______

• 2

• 3

• 5

• 8

Exercise 7.2 | Q 8 | Page 254

Every _______ number of the Fibonacci sequence is a multiple of 8

• 2nd

• 4th

• 6th

• 8th

Exercise 7.2 | Q 9 | Page 254

The difference between the 18th and 17th Fibonacci number is

• 233

• 377

• 610

• 987

Exercise 7.2 | Q 10 | Page 254

Common prime factors of 30 and 250 are

• 2 × 5

• 3 × 5

• 2 × 3 × 5

• 5 × 5

Exercise 7.2 | Q 11 | Page 254

Common prime factors of 36, 60 and 72 are

• 2 × 2

• 2 × 3

• 3 × 3

• 3 × 2 × 2

Exercise 7.2 | Q 12 | Page 254

Two numbers are said to be co-prime numbers if their HCF is

• 2

• 3

• 0

• 1

Exercise 7.3 [Pages 260 - 261]

### Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Mathematics Answers Guide Chapter 7 Information ProcessingExercise 7.3 [Pages 260 - 261]

#### Fill in the blanks (Use Atbash Cipher that is given in code 3)

Exercise 7.3 | Q 1. (i) | Page 260

G Z N R O = _____________________________

Exercise 7.3 | Q 1. (ii) | Page 260

V M T O R H S = _____________________________

Exercise 7.3 | Q 1. (iii) | Page 260

N Z G S V N Z G R X H = _____________________________

Exercise 7.3 | Q 1. (iv) | Page 260

H X R V M X V = _____________________________

Exercise 7.3 | Q 1. (v) | Page 260

H L X R Z O H X R V M X V = _____________________________

Exercise 7.3 | Q 2 | Page 260

Match the following :

( a = 00……………. Z= 25)

 Column A Column B (i) mathematics (a) 18 20 01 19 17 00 02 19 08 14 13 (ii) addition (b) 03 08 21 08 18 08 14 13 (iii) subtraction (c) 12 00 19 07 04 12 00 19 08 02 18 (iv) multiplication (d) 00 03 03 08 19 08 14 13 (v) division (e) 12 20 11 19 08 15 11 15 02 22 19 08 14 13
Exercise 7.3 | Q 3 | Page 260

Frame Additive cipher table (key = 4)

Exercise 7.3 | Q 4 | Page 260

A message like “Good Morning” written in reverse would instead be “Doog Gninrom” In the same way decode the sentence given below:

“Ot dnatsrednu taht scitamehtam nac eb decneirepxe erehwreve ni erutan dna laer efil”

Exercise 7.3 | Q 5. I. | Page 261

Decode the given Pigpen Cipher text and compare your answer to get result.

The room number in which the treasure took place

Exercise 7.3 | Q 5. II. | Page 261

Decode the given Pigpen Cipher text and compare your answer to get result.

Place of the treasure

Exercise 7.3 | Q 5. III. | Page 261

Decode the given Pigpen Cipher text and compare your answer to get result.

The name of the treasure

Exercise 7.3 | Q 6 | Page 261

Praveen recently got the registration number for his new two-wheeler. Here, the number is given in the form of mirror-image. Encode the image and find the correct registration number of praveen’s two-wheeler.

#### Objective Type Questions

Exercise 7.3 | Q 7. (i) | Page 261

In there are four groups of letters in each set. Three of these sets are alike in some way while one is different. Find the one which is different

• C R D T

• A P B Q

• E U F V

• G W H X

Exercise 7.3 | Q 7. (ii) | Page 261

In there are four groups of letters in each set. Three of these sets are alike in some way while one is different. Find the one which is different

• H K N Q

• I L O R

• J M P S

• A D G J

Exercise 7.3 | Q 8 | Page 261

A group of letters are given. A numerical code has been given to each letter. These letters have to be unscrambled into a meaningful word. Find out the code for the word so formed from the 4 answers given

• 2 3 4 1 5 6

• 5 6 3 4 2 1

• 6 1 3 5 2 4

• 4 2 1 3 5 6

Exercise 7.3 | Q 9. (i) | Page 261

Question is based on code language. Find the correct answer from the four alternatives given.

In a certain code, ‘M E D I C I N E’ is coded as ‘E O J D J E F M’, then how is ‘C O M P U T E R’ written in the same code?

• C N P R V U F Q

• C M N Q T U D R

• R F U V Q N P C

• R N V F T U D Q

Exercise 7.3 | Q 9. (ii) | Page 261

Question is based on code language. Find the correct answer from the four alternatives given.

lf the word ’P H O N E’ is coded as ’S K R Q H’, how will ‘R A D I O’ be coded?

• S C G N H

• V R G N G

• U D G L R

• S D H K Q

Exercise 7.4 [Pages 271 - 272]

### Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Mathematics Answers Guide Chapter 7 Information ProcessingExercise 7.4 [Pages 271 - 272]

Exercise 7.4 | Q 1. (i) | Page 271

Find the best buy of the following purchases:

A pack of 5 chocolate bars for ₹ 175 or 3 chocolate bars for ₹ 114?

Exercise 7.4 | Q 1. (ii) | Page 271

Find the best buy of the following purchases:

Basker buy 1 1/2 dozen of eggs for ₹ 81 and Aruna buy 15 eggs for ₹ 64.50?

Exercise 7.4 | Q 2 | Page 271

Using the given picture find the total special offer price of fresh sweets and bakery products to buy 1/2 kg laddu, 1 kg cake, 6 pockets of bread

Exercise 7.4 | Q 3 | Page 271

Using the given picture prepare a price list.

Suppose you plan to buy 1 1/2 kg of apple, 2 kg of pomegranate, 2 kg of banana, 3 kg of mango, 1/2 kg of papaya, 3 kg of onion, 1 1/2 kg of tomato, and 1 kg of carrot in shop 1, how much will you save compared to shop 2.

Exercise 7.4 | Q 4 | Page 272

You want to buy some grocery items as per your shopping list that are given in the picture with their price. Also you have a bag that capacity of carrying 7 kg. Using weight ratio approach tabulate to find the total price and how much can you buy more grocery items within your budget of ₹ 1000 and not exceeding 7 kg.

#### Objective Type Questions

Exercise 7.4 | Q 5 | Page 272

Online or television advertisements influence people on spending decisions by

• using special music

• making them think that they need the item

• using attractive pictures

• all the above

Exercise 7.4 | Q 6 | Page 272

When I go shopping, I will buy

• something that looks attractive

• something my friend has

• something that I need to purchase

• the first thing I see in the store

Exercise 7.4 | Q 7 | Page 272

The best shopping choice is to

• shop at brand name stores always buy

• compare the choices before buying

• the same thing my friends bought

• buy at a regular shop always

## Chapter 7: Information Processing

Exercise 7.1Exercise 7.2Exercise 7.3Exercise 7.4

## Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Mathematics Answers Guide chapter 7 - Information Processing

Tamil Nadu Board Samacheer Kalvi solutions for Class 8th Mathematics Answers Guide chapter 7 (Information Processing) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Tamil Nadu Board of Secondary Education Class 8th Mathematics Answers Guide solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Tamil Nadu Board Samacheer Kalvi textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8th Mathematics Answers Guide chapter 7 Information Processing are Cryptology, Shopping Comparison, Packing, Information Processing, Principles of Counting, SET - Game, Map Colouring, Fibonacci Numbers, Highest Common Factor, Prime Factorisation, Factorisation by Taking Out Common Factors, Repeated Division Method of HCF, Repeated Subtraction Method.

Using Tamil Nadu Board Samacheer Kalvi Class 8th solutions Information Processing exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Tamil Nadu Board Samacheer Kalvi Solutions are important questions that can be asked in the final exam. Maximum students of Tamil Nadu Board of Secondary Education Class 8th prefer Tamil Nadu Board Samacheer Kalvi Textbook Solutions to score more in exam.

Get the free view of chapter 7 Information Processing Class 8th extra questions for Class 8th Mathematics Answers Guide and can use Shaalaa.com to keep it handy for your exam preparation