Copyright © University of Cambridge. All rights reserved.

'Twenty Divided Into Six' printed from http://nrich.maths.org/

Show menu


Katie had a pack of twenty cards numbered from $1$ to $20$.

20 cards numbered from 1 to 20.

She arranged the cards into six piles. 

The numbers on the cards in each pile added to the same total.

What was the total and how could this be done? Are you curious enough to find out?