Math Fun Series 4/5: Handshakes

Try this math puzzle! Looks easy but it's not!

This is just a teaser of the 'Maths Kit' that we have at Petrosains! Try the real thing at Petrosains & our Playsmarts today!

Check them all at:

Math Fun Series 1/5: http://creating-wonder.blogspot.my/2016/04/math-fun-series-15-cola-crate.html

Math Fun Series 2/5: http://creating-wonder.blogspot.my/2016/04/math-fun-series-25-pentominoes.html

Math Fun Series 3/5: http://creating-wonder.blogspot.my/2016/04/math-fun-series-35-reach-goal.html

Math Fun Series 4/5: http://creating-wonder.blogspot.my/2016/04/math-fun-series-45-handshakes.html  
Math Fun Series 5/5: http://creating-wonder.blogspot.my/2016/05/math-fun-series-55-packing-balls.html