Christmaths Advent Calendar 2013: Day 61 minute read

This year’s Christmaths Advent Calendar will have a question for every day in December up to and including Christmas Day, each one featuring a new mathematical challenge.

Rulers cost 45p each. Pens cost 35p each.

Danielle bought four rulers and a bunch of pens.

She paid with a £5 note and received 40p change.

How many pens did she buy?

Got an answer? Please leave a comment below.

Mr Pitts currently teaches Computing to the whole school along with some other subjects during teacher's PPA time. He runs this website and makes sure it all works smoothly, most of the time!


  1. India : O
    Friday, December 6th 2013 @ 22:37


    • Mr Pitts
      Friday, December 6th 2013 @ 23:14

      8 pens is correct.

      4 x 45p = 180p (£1.80) plus 40p change means there is still 280p (£2.80) to spend.

      280p divided by 35p means that 8 pens can be bought.