If you use your parents' debit card online, when do they have to pay?

One bookshop is offering three books for the price of two, and another offers buy one get one half price. If books cost £ 6.99 each, which deal is best (price per book)?

In 2009, what's the average weekly pocket money for a child between seven and 15?

A ringtone service charges £ 4.50 a week for unlimited downloads. How much will that cost for a whole year?

The X Factor has come to an end for another series, and all three finalists have made albums. They all cost £ 8.99 to buy. If you get £ 2.50 an hour for chores from your parents, how many complete hours do you need to work to buy all three?