downsizeUsing the numbers 1, 2, 3, 4 and 5 once and only once and the symbols × and ÷  once and only once, what is the smallest whole number you can make?

Now suppose you have to use the symbol + once and the symbol ÷ twice what is the smallest fraction that you can find?

For example \frac{1}{4}+\frac{2}{35}= \frac{43}{140}.

Can you find a smaller fraction?

Click here to download the Downsize worksheet

See the Notes for Teachers.

This problem is adapted from the NRICH task  1, 2, 3, 4, 5 with permission of the University of Cambridge. All rights reserved.


Tagged with:

One Response to Downsize

  1. Manxesi Nxesi says:

    I presented the problem to my Grade 6 learners.It was very challenging. I got many answers but the last group to finish says its 114. They did it like 152/4*3=114

Leave a Reply

Set your Twitter account name in your settings to use the TwitterBar Section.