As few coins as possible
You learn to make an amount with as few notes and coins as possible.
How to work it out
- Take the biggest note that still fits first.
- See how much is left, and again take the biggest one that fits.
- That way you use as few notes and coins as possible.
£37.00
Make 37 with as few notes and coins as possible.
- Start with the biggest note that fits: 20.
- Then 17 is left, and 10 fits into that.
- Then 7 is left: 5 fits, and then 2 more.
- So 20 + 10 + 5 + 2: four notes and coins.
More examples
Make 15.
10 + 5: two notes.
Make 8.
5 + 2 + 1: one note and two coins.