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One problem - many ways to solve... (Posted on 2017-12-21) Difficulty: 3 of 5
The problem below (Moscow Puzzles #313) can be solved in more than 4 ways,
(each d1 by itself) - using different approaches.

Find the number t and the digit represented by k in:

List your ways of solving it.

No Solution Yet Submitted by Ady TZIDON    
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Simple way to determine t | Comment 4 of 6 |
Mod 10, the equation becomes 9*t^2 = 4
Then t^2 must equal 6 mod 10,
so t can only be 4 or 6.

Substitute both values in [3*(230+t)}^2 and evaluate.

This leads to the result that t can only be 4

  Posted by Steve Herman on 2017-12-21 17:30:30
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