In a game of 'Numbers Tic‑Tac‑Toe', each child writes a single digit between 0 and 9 on a square. If 4 children participate, how many different single‑digit numbers can be written in total across the board?
Answer
4
The correct answer is 4 — Thus the total number of single‑digit numbers is 4.
Step-by-step solution
- Each child writes one digit.
- With 4 children there are 4 digits written.
- Thus the total number of single‑digit numbers is 4.
Common mistake: Adding all possible digits (0‑9) instead of counting the children.
Concept tested: Counting objects in a game
Published · How this solution was prepared and checked
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