Wednesday, 9 October 2013

mathematics - Use 1 9 6 2 in this order to make 75


I'm looking for a solution to make number $75$ with numbers $1$ $9$ $6$ $2$ in that order and the same rules as in Use 2 0 1 and 8 to make 67.
Here a copy of those rules:





  1. You must use all 4 digits. Only the digits $1$, $9$, $6$, and $2$ can be used in that order.
    You can make multi-digit numbers out of the numbers. Examples: $19$, $96.2$




  2. The square function may NOT be used. Nor may the cube, raise to a fourth power, or any other function that raises a number to a specific power. You may use the ^ operation if you use a digit, for example, $(1 + 9)^6 - 2!$ is acceptable (if you're trying to get $999998$), because 1, 9, 6, and 2 are used. However, $19 ^ 2 / 6 + 2$ can't be used to get $62.166...$ because it uses an extra 2.




  3. Sorry, but the integer function may NOT be used. Nor may the round, floor, ceiling, or truncate functions.





  4. $+$, $-$, $\times$, $\div$ or $\frac{\Box}{\Box}$, $()$, $!$, $\sqrt{\Box}$, ${\Box}^{\Box}$, and $!!$ may be used for functions.




Please no brute-force methods. Good luck.



Answer



how about this?



$$1\times 9/.6/.2$$



this is allowed right?



No comments:

Post a Comment

Understanding Stagnation point in pitot fluid

What is stagnation point in fluid mechanics. At the open end of the pitot tube the velocity of the fluid becomes zero.But that should result...