How to find the number of 10 digit numbers using each of the digits from 0 to 9 once, with no digit smaller than both neighbours - Quora
Write down all the ten digit numbers whose digital sum is 2. (The digital sum of a number is the sum of the digits of the number. - Sarthaks eConnect | Largest
6. A number consists of two digits of which the ten's digit exceeds the unit's digit by 6. The number itself is equal to ten times the sum of digits. Find the number.
![10 Digit number puzzle of John Conway with solution | SureSolv | Number puzzles, Math puzzles brain teasers, Maths puzzles 10 Digit number puzzle of John Conway with solution | SureSolv | Number puzzles, Math puzzles brain teasers, Maths puzzles](https://i.pinimg.com/736x/da/a1/ce/daa1ce1838ee88bef96bbf7dd50eb3ef.jpg)