If all the students in this room shook hands with each other, how many handshakes would there be altogether?
Topics: Starter  Investigations  Number  Problem Solving
Solving the classical #handshakes problem in a #maths lesson with a difference. #GirlsInSTEM pic.twitter.com/cWQKcSf4AC
— MSY_STEAM (@MSY_STEAM) October 10, 2017
How did you use this starter? Can you suggest
how teachers could present or develop this resource? Do you have any comments? It is always useful to receive
feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.
If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:
This starter has scored a mean of 3.2 out of 5 based on 858 votes.
Previous Day  This starter is for 8 November  Next Day
Sign in to your Transum subscription account to see the answers
Can you find a formula for the number of handshakes given the number of students?
Edward and Lucy invite four couples to dinner. Each person shakes hands only with the people that he or she has not met before. Edward then asks his wife and eight guests how many hands they shook, and he receives nine different answers. How many people did Lucy shake hands with?
Bellos, Alex. Can You Solve My Problems?: a Casebook of Ingenious, Perplexing and Totally Satisfying Puzzles. Guardian Books, 2017.
Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon search box and some items chosen and recommended by Transum Mathematics to get you started.
Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=November8
Here is the URL which will take them to a related student activity.
See the National Curriculum page for links to related online activities and resources.