Question 250303
<font face="Garamond" size="+2">


The first digit must be 3, 5, or 6, but not zero.  So there are 3 ways to choose the first digit.  Since repetition is allowed, there are then 4 ways to choose each of the other three digits, so the total number of possibilities is:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 3\,\cdot\,4^3]


The arithmetic is yours to do.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
</font>