Help Stop Spam

[Icy]

Use some simple math problems! As long as it is wordy some intelligent thought must be applied.

Eg.

Mary bought three dozen eggs, normally priced at two dollars per dozen, at a fifteen percent discount. How much did she pay?

If Jack has a red and a blue pebble, Jane has two yellow pebbles, John has a blue pebble, and Jocelyn has three green pebbles. How many more pebbles than the boys do the girls have?

What is the remainder when the number of English alphabets is divided by four?

What is the area/volume of a square/cube of length _____?

If a billion kilograms of spaghetti is consumed worldwide each year, and a five hundred gram packet contains six hundred sticks each of length thirty centimeters, what distance will the spaghetti cover if joined end-to-end? [Answer in kilometers]

There are sixty-six legs in a farm of ducks and cattle that houses a total of twenty-two animals. How many ducks are there?

Note: some problems require satisfactory grasp of primary school mathematics.