ROSECODE 193
Antipodean numbers
A number is antipodean if it is equal to is rotation by 180°: you type such a number on a calculator and turn it upside down, you read the same value.
- 1961 is such a number
How many antipodean numbers with a number of digits less or equal to 17 are there and what is there sum?
Answer format: Count,Sum
You are given: 14404,5947658589706 // For 9 digits or less
[My timing: 50 sec]
- 1961 is such a number
How many antipodean numbers with a number of digits less or equal to 17 are there and what is there sum?
Answer format: Count,Sum
You are given: 14404,5947658589706 // For 9 digits or less
[My timing: 50 sec]