Class 6 Mathematics | Knowing Your Numbers Expected Questions

CLASS 6 MATHEMATICS | Knowing Our Numbers – Practice Questions

1. Find the greatest and the smallest number in each of the following:

a) 372, 9875, 21, 87642, 650
b) 1354, 876590, 7653, 124, 6543

2. Use the given digits without repetition and make the greatest and smallest 4- digit numbers:

a) 4, 9, 1, 3
b) 3, 4, 0, 1

3. Make the greatest and the smallest 4 – digit numbers by using any one digit twice:

a) 4, 6, 8
b) 9, 0, 2

4. Make the greatest and the smallest 4 – digit numbers using any four different digits with conditions as given:

a) Digit 6 is always at ones place.
b) Digit 9 is always at thousands place.

5. Arrange the following numbers in ascending order:

a) 9086, 9087, 9012, 9022, 8760
b) 5000, 8654, 9021, 8964, 1286

6. Put commas suitably and write the number name according to Indian System of Numeration:

a) 5643289
b) 90876521

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

a) 65478943
b) 14325678

8. The distance between the school and a student’s house is 1 km 785 m. Everyday she walks both ways. Find the total distance covered by her in 5 days?

9. Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens):

a) 563 + 332 + 3498
b) 109764 – 65784

10. Write in Roman Numerals:

a) 452
b) 986

Answers:

1. a)Greatest number = 87642
Smallest number = 21
b) Greatest number = 876590
Smallest number = 124

2. a) Greatest number = 9431
Smallest number = 1349
b) Greatest number = 4310
Smallest number = 1034

3. a) Greatest number = 8864
Smallest number = 4468
b) Greatest number = 9920
Smallest number = 2009

4. a) Greatest number = 9876
Smallest number = 1026
b) Greatest number = 9876
Smallest number = 9012

5. a) 8760, 9012, 9022, 9086, 9087
b) 1286, 5000, 8654, 8964, 9021

6. a) 56,43,289
Number name: Fifty six lakh forty three thousand two hundred eighty nine.
b) 9, 08, 76,521
Number name: Nine crore eight lakh seventy six thousand five hundred twenty one.

7. a) 65,478,943
Number name: Sixty five million four hundred seventy eight thousand nine hundred forty three.
b) 14,325,678
Number name: Fourteen million three hundred twenty five thousand six hundred seventy eight.

8. Distance between school and student’s house = 1 km 785m = 1785m
Distance travelled in one day = 1785 x 2 = 3570 m
Distance travelled in 5 days = 3570 x 5 = 17850 m = 17 km 850m.

9. a) Rough estimate:

Rounds off to nearest hundreds
563 rounds off to 600
332 rounds off to 300
3498 rounds off to 3500
Estimated sum = 600 + 300 + 3500 = 4400
Closer estimate:
Rounds off to nearest tens
563 rounds off to 560
332 rounds off to 330
3498 rounds off to 3500
Estimated sum = 560 + 330 +3500 = 4390
b) Rough estimate:
Rounds off to nearest hundreds
109764 rounds off to 109800
65784 rounds off to 65800
Estimated difference = 109800 – 65800 = 44000
Closer estimate:
Rounds off to nearest tens
109764 rounds off to 109760
65784 rounds off to 65780
Estimated difference = 109760 – 65780 = 43980

10. 452 = CDLII
986 = CMLXXXVI