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| 1. |
The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number? |
| Answer» Let the ten's digit be x and unit's digit be y. Then, (10x + y) - (10y + x) = 36 9(x - y) = 36 x - y = 4. Video Explanation: https://youtu.be/7QOJjAmGVx0 | |