Punjab State Board PSEB 6th Class Maths Book Solutions Chapter 1 Knowing Our Numbers Ex 1.1 Textbook Exercise Questions and Answers.

## PSEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.1

1. Write the smallest and the greatest number:

Question (a)

30900, 30594, 30945, 30495

(b) 10092, 10029, 10209, 10920.

Solution:

(a) All the given numbers are: 30900, 30594, 30945, 30495 are five-digit numbers. Let us examine digits on extreme left side of each number. First digit and second digit of all the numbers are same.

Then by observing the third and fourth digits from left side we conclude that

Smallest number = 30495

Greatest number = 30945

Question (b)

10092, 10029, 10209, 10920.

Solution:

All the given numbers are: 10092, 10029, 10209, 10920 are five digit numbers. Let us examine digits on extreme left side of each number. First digit and second digit from left of all the numbers are same.

Then by observing third and fourth digits from left we conclude that

Smallest number = 10029

Greatest number = 10920

2. Arrange the numbers in ascending order:

Question (a)

6089, 6098, 5231, 3953

Solution:

Ascending order is:

3953, 5231, 6089, 6098

Question (b)

49905, 6073, 58904, 7392

Solution:

Ascending order is:

6073, 7392, 49905, 58904

Question (c)

9801, 25751, 36501, 38802.

Solution:

Ascending order is:

9801, 25751, 36501, 38802

3. Arrange the numbers in descending order:

Question (a)

75003, 20051, 7600, 60632

Solution:

Descending order is:

75003, 60632, 20051, 7600

Question (b)

2934, 2834, 667, 3289

Solution:

Descending order is:

3289, 2934, 2834, 667

Question (c)

1971, 45321, 88715, 92547.

Solution:

Descending order is:

92547, 88715, 45321, 1971.

4. Use the given digits without repetition and make the greatest and smallest 4 digit number:

Question (a)

6, 4, 3, 2

Solution:

6432, 2346

Question (b)

9, 7, 0, 3

Solution:

9730, 3079

Question (c)

5, 4, 0, 3

Solution:

5430, 3045

Question (d)

3, 2, 7, 1.

Solution:

1321, 1237.

5. Using any one digit twice make the greatest and the smallest 4 digit number:

Question (i)

(a) 2, 3,7

(b) 5,0,3

(c) 2, 3, 0

(d) 1, 3, 4

(e) 2, 5, 8

(f) 1, 2, 3

Solution:

(a) 7732, 2237

(b) 5530, 3005

(c) 3320, 2003

(d) 4431, 1134

(e) 8852, 2258

(f) 3321, 1123

6. Read the following numbers using place value chart:

Question (i)

(a) 638975

(b) 84321

(c) 29061058

(d) 60003608.

Solution:

Place Value Chart:

C | TL | L | TTh | Th | H | T | O | |

(a) | 6 | 3 | 8 | 9 | 7 | 5 | ||

(b) | 8 | 4 | 3 | 2 | 1 | |||

(c) | 2 | 9 | 0 | 6 | 1 | 0 | 5 | 8 |

(d) | 6 | 0 | 0 | 0 | 3 | 6 | 0 | 8 |

(a) Six lakh thirty-eight thousand nine hundred seventy-five

(b) Eighty-four thousand three hundred twenty-one

(c) Two crore ninety lakh sixty one thousand fifty-eight

(d) Six crore three thousand six hundred eight.

7. Insert commas suitably and write the names according to Indian System of Numeration:

Question (a)

98606873

Solution:

9,86,06,873

Nine crore eighty-six lakh six thousand eight hundred seventy-three.

Question (b)

7635172

Solution:

76,35,172

Seventy-six lakh thirty-five thousand one hundred seventy-two.

Question (c)

89700057

Solution:

8,97,00,057

Eight crore ninety-seven lakh fifty-seven.

Question (d)

89322602

Solution:

8,93,22,602

Eight crore ninety-three lakh twenty-two thousand six hundred two.

Question (e)

4503217

Solution:

45,03,217

Forty-five lakh three thousand two hundred seventeen.

Question (f)

90032045.

Solution:

9,00,32,045

Nine crore thirty-two thousand forty-five.

8. Insert commas suitably and write the names according to International System of Numeration:

Question (a)

89832081

Solution:

89,832,081

Eighty-nine million eight hundred thirty-two thousand eighty-one.

Question (b)

6543374

Solution:

6,543,374

Six million five hundred fourty three thousand three hundred seventy-four.

Question (c)

88976306

Solution:

88,976,306

Eighty-eight million nine hundred seventy-six thousand three hundred six.

Question (d)

9860001

Solution:

9,860,001

Nine million eight hundred sixty thousand one.

Question (e)

90032045

Solution:

90,032,045

Ninety million thirty-two thousand forty-five.

Question (f)

4503217

Solution:

4,503,217

Four million five hundred three thousand two hundred seventeen.

9. Write the number names as numerals:

Question (a)

Seven lakh fifty-four thousand

Solution:

7,54,000

Question (b)

Nine crore fifty-three lakh seventy-four thousand five hundred twenty-three.

Solution:

9,53,74,523

Question (c)

Six hundred forty-seven thousand five hundred twenty-five.

Solution:

647,525

Question (d)

Seventy-two million three hundred thirty-two thousand one hundred twelve.

Solution:

72,332,112

Question (e)

Fifty-eight million four hundred twenty-three thousand two hundred two.

Solution:

58,423,202

Question (f)

Twenty-three lakh thirty thousand ten.

Solution:

23,30,010.

10. How many eight-digit numbers are there in all?

Solution:

Largest eight-digit number is 99999999.

Largest seven-digit number is 9999999.

Total number of eight digit numbers = Largest eight digit – Largest seven digit number

= 99999999 – 9999999

= 90000000

11. Fill in the blanks:

Question (i)

(a) 1 Lakh = ten thousand

(b) 1 Million = hundred thousand

(c) 1 Crore = ten lakh

(d) 1 Crore = million

(e) 1 Million = lakh.

Solution:

(a) Ten

(b) Ten

(c) Ten

(d) Ten

(e) Ten