Mathematica, 27 25 bytes

Writes 10 in base 24. Half the length is one function name :(

IntegerString[2(8-3),3*8]

Thanks to Xavier for pointing out that the base doesn't have to be 16 (as in my original hexadecimal solution)!

Mathematica, 27 25 24 bytes

Writes 10 in base 24. Half the length is one function name :(

IntegerString[2(8-3),33]

Thanks to Xavier for pointing out that the base doesn't have to be 16 (as in my original hexadecimal solution), and thanks to c-- for saving another byte!

Mathematica, 27 bytes

Writes 10 in hexadecimal. Half the length is one function name :(

IntegerString[2(8-3),2^2^2]

Mathematica, 27 25 bytes

Writes 10 in base 24. Half the length is one function name :(

IntegerString[2(8-3),3*8]

Thanks to Xavier for pointing out that the base doesn't have to be 16 (as in my original hexadecimal solution)!