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- Thu Apr 01, 2021 11:00 am
- Forum: Divisional Math Olympiad
- Topic: BdMO Regional 2021 Secondary P8
- Replies: 4
- Views: 7132
Re: BdMO Regional 2021 Secondary P8
shouldn't the ans be 3*8*8 ? In the 3 sets there are 4 column. and there are 3 ways to select two of them(as rest two is automatically selected). again there are 8 possible ways to select the numbers between the two column to satisfy the condition . so ans should be 3*8*8. (Third 8 is for the rest t...