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, ______, ______, ______, ______, ______

Answer 1

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