Math Olympiad | 2013 | Division E | Contest 1 | MOEMS | 1C

2 years ago
1

For a certain 3-digit number:
- the digits are in increasing order
- the difference of the greatest and least digits is 7
- it is a multiple of 9 and greater than 200.
Find the 3-digit number.

Key: Knowing that 9 equals 3 x 3, using logic to change digits into following the rules

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