NCERT · Class 6 · Mathematics · Knowing Our NumbersWhat is the greatest 4-digit number that can be formed using the digits 7, 2, 9, and 1 without repeating any digit?
Step-by-Step Solution
To form the greatest number, we arrange the given digits in descending order (from largest to smallest): 9 > 7 > 2 > 1.\nTherefore, the greatest 4-digit number formed is 9721.
Detailed Options Breakdown
Option : 9721 (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 1: 9712
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Knowing Our Numbers.
Option 2: 9271
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Knowing Our Numbers.
Option 3: 7921
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Knowing Our Numbers.
💡 Study Guide: This question tests core syllabus concepts from Knowing Our Numbers. For formulas, key summaries, and mock exam reference guides, read the full Knowing Our Numbers Revision Notes.