Two-digit numbers: 90 (10 to 99), Three-digit numbers: 900 (100 to 999), Four-digit numbers: 9,000 (1,000 to 9,999), Five-digit numbers: 90,000 (10,000 to 99,999). Class 6 Mathematics Chapter 3 Number Play question answer Class 6 NCERT Ganita Prakash Chapter 3 Number Play