From wikipedia (fountain of all knowledge lol!!!)
An
aptitude is an innate, acquired or learned or developed component of a
competency (
being the others: knowledge, understanding and attitude) to do a certain kind of
work at a certain level. Aptitudes may be
physical or
mental.
So answer is yes. You can improve aptitude.
Subsequent replies might go off on a tangent - i.e you can't practice for the pilapt test, its all natural ability blah blah zzzzz.
Good tip for example - when driving or whilst doing something, get someone to ask you maths questions, or get them to count down sequentially then change the difference and you have to signal the change.
Read billboard signs as quck as possible on the commute and try and remember what they said.
PLay your computer console and answer maths questions from someone in the room.
Therefore in relation to pilot training/selection test, you can improve your aptitude in order to pass a pilapt and maths/pysics tests.