Goal and options: To make an iron man helmet with the face plate that opens up.
output answer: Attach the face plate to the rest of the helmet at the top using a servo motor. Attach a switch to move the face plate up using the motor.

Goal and options: eat grapefruit
output answer: Using a small knife, cut the grapefruit in half. Cut each half into wedges. Cut each half in half again and repeat until standard wedges are produced. Cut along the rind to remove just the fruit. Cut the wedge in half and remove the center pips.

Goal and options: To help keep your carpets clean,
output answer:
have guests take off their shoes before entering your home.