Could you save someone's life?

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Would you know how to react if someone had a heart attack? What would you do if your friend started suffering from hypothermia?

This week's quiz questions have all been set by Isobel Sternfeld, training officer for St John Ambulance.

They all feature situations you could encounter in real life and Isobel strongly believes everyone should know how to react if faced with such a situation.

St John Ambulance has a first aid course specifically for people who spend a lot of their time in the outdoors. It would definitely be worth checking out by clicking here.

This is your last chance to put your name in the hat for one of 10 Sigg Smoked Pearl 'Traveller' 1.0L bottles. Simply answer the prize question at the end of the quiz for your chance to win.

Click the link in the quiz to submit your answer OR email it to, with the subject 'Sigg Special Question Entry 23/12/08'. Don't forget to include your name and address!

Good luck!