Question

0xBED into 3-base representation

Answer 1

0xBED is an hexadecimal representation. 
Transforming to decimal first:
B => 11
E => 14
D => 13
$11\times16^2+14\times16+13=3053$
Now by successive devisions, we get the base three:
$3053=2+2\times3^3+3^4+3^6+3^7$
And the resulting base three expression:
$11012002_{3}$