g
Gyaan Maths
CBSE · Class 6-10
Back to chapter
CBSE Maths · Class 6

Chapter 1: Knowing Our Numbers

Name: ________________________
Date: ______________
Marks: ____ / 10

Comparing and reading large numbers; Indian and international place-value systems; estimation; Roman numerals; use of brackets.

Questions

  1. Write the largest 5-digit number using digits 4,7,0,9,14, 7, 0, 9, 1 (no repetition).
  2. Convert 4949 to Roman.
  3. Estimate 578×161578 \times 161 to the nearest hundred.
  4. Write 1020300410203004 in Indian place-value system with commas.
  5. Roman numeral for 8989.
  6. Round 85678567 to the nearest thousand.
  7. Which is larger: 9999999999 or 100000100000?
  8. Convert 55 km 250250 m into cm.
  9. Add: 23405+7859523405 + 78595.
  10. Estimate 493×208493 \times 208 to the nearest hundred.

Extra Practice (Optional)

  • Write the smallest 6-digit number using digits 5,0,1,6,8,35,0,1,6,8,3.
  • Convert 22 km 5050 m into metres.
  • Roman numeral for 8989.

Answer Key (For Teachers)

  1. Answer: 9741097410.
    Working: Arrange in descending order. → 9,7,4,1,09, 7, 4, 1, 0.
  2. Answer: XLIXXLIX.
    Working: 49=40+949 = 40 + 9. → 40=XL,  9=IX40 = XL,\; 9 = IX.
  3. Answer: ≈120000\approx 120000.
    Working: 578→600,  161→200578 \to 600,\; 161 \to 200. → 600×200=120000600 \times 200 = 120000.
  4. Answer: 1,02,03,0041,02,03,004
    Working: Group from right: 1,02,03,0041,02,03,004.
  5. Answer: LXXXIXLXXXIX
    Working: 89=80+989 = 80 + 9; 80=LXXX80 = LXXX, 9=IX9 = IX.
  6. Answer: 90009000
    Working: Hundreds digit 5≥55 \ge 5 → round up.
  7. Answer: 100000100000
    Working: 66-digit number is larger than 55-digit.
  8. Answer: 525000525000 cm
    Working: 55 km =500000= 500000 cm; 250250 m =25000= 25000 cm; total 525000525000.
  9. Answer: 102000102000
    Working: Column addition gives 102000102000.
  10. Answer: ≈100000\approx 100000
    Working: 493→500493 \to 500, 208→200208 \to 200; 500×200=100000500\times 200 = 100000.
Gyaan Maths · CBSE Class 6 · Chapter 1
Gyaan Maths — CBSE Class 6-10, built for board-toppers.
v1.1 · Feb 2026