Here is a question form a NCEA Maths paper

J has $5000 to invest for two and a half years

Two schemes to choose from

Scheme 1 - Invest the money in an account that pays 3.25% interest only at the end of each year

Scheme 2 - Invest the money in an account that pays 1.3% interest at the end of each six months

The question asked which would be the best scheme?

Now ordinarily this is a easy question except that it is open to more than one interpretation My query is why do the people who set these questions not see the ambiguities.

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