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Question
Think of all 2, 3 and 4 digit numbers which look the same on half a turn.
Example
- 2 digit numbers 11, ______, ______
- 3 digit numbers 101, 111, ______, ______, ______, ______, ______, ______
- 4 digit numbers 1001, 1111, ______, ______, ______, ______, ______
Solution
Some examples are given below:
- 2. digit numbers, 11, 88
- 3. digit numbers: 101, 111, 181, 808, 888
- 4. digit numbers: 1001, 1111, 1881, 8008, 8118, 8888
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