Is it permissible to use ready-made answers from a friend for a small work task in order to get a promotion to a larger job with a higher salary?

If you can learn from your friend to accomplish the task, then this is permissible, because you gain experience and become qualified for promotion based on your abilities. However, if your friend does the work on your behalf and you present it as your own, then this is not permissible because it is deceit. "Whoever cheats us is not of us," and "the one who satiates himself with what he has not been given is like one who wears two garments of falsehood."