A two digit number is such that, the sum of its digit is 13.When the digits are interchange, the original number is increased by
9. Find the original number.
1 answer:
Answer:
Concept: Mathematical Representation
- You have a two digit # __
- The sum of the two digit # = 13
- The original # increased by 9
- Hence we must find values that sum to 13. *Note they must be independently standing.
- 8+5, 9+6, 7+6 , 6+7 , and etc
- The value must also increase by 9
- So logically it would be any result that when switched that value would be 76-67= 9.
- So the value must be 67
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