Question 1204431
Obviously not.  Starting with 3, and then only powers of 3, and you know by LOOKING at 280, this is not a power of 3.


In case you did not know or forgot,  beginning with 3, any and all powers of 3 will have sum of the digits being equal to a multiple of 3.
Look at 280.
find sum of 2+8+0.
That sum is 10.
10 is very obviously not a multiple of 3.