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Results tagged with calculation-puzzle
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user 32642
A puzzle that involves numerical calculations, such as multiplication and addition. Use with the [mathematics] tag.
2
votes
Accepted
Macbook air falls off x floors and survives!
Test at floors $14,27,39,50,60,69,77,84,90,95,99$. When it fails, then just test the floors going up to that e.g If it fails on floor 60, then test 51,52,53,...
This takes a total of 14 trials maximu …
- 9,283
4
votes
2
answers
979
views
Use 2, 0, 1 and 8 to make 71
Use all and only the digits $2,0,1,8$ once each to make the number $71$.
Allowed operations; anything not on this list is banned:
$+,-,\times,\div, ()$ (parentheses and/or choose function)
Concaten …
- 9,283
5
votes
Accepted
Curiosity of February 5$^{th}$
I'll interpret the 'general case' as:
Find all pairs of positive integers $(a,b)$ such that $a.b\times\frac{a}{b}=1$ where $a.b$ means a concatenation of $a,b$ with a decimal dot in between.
I'll pres …
- 9,283
38
votes
Accepted
7
votes
Accepted