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Three fours (Posted on 2017-12-06) Difficulty: 3 of 5
Majority of the integers from 1 to 100 can be evaluated using three 4's, +, -, *, /, ^, sqrt, decimal point, dot above a number, and !,!!,...? (both as factorials, multifactorials and subfactorials).

Clearly, both concatenation and brackets are allowed.

Let's try to minimize the set of "not achievable" numbers.

Team work to include all possible answers is encouraged.

No Solution Yet Submitted by Ady TZIDON    
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Hints/Tips re: computer solutions (spoilers) | Comment 2 of 3 |
(In reply to computer solutions (spoilers) by Charlie)

Nice indeed!

53=44+?4     or  you have a better one

Now in a hurry, will add my comments later to-day.

  Posted by Ady TZIDON on 2017-12-07 02:15:37
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