Weekly Maths Challenge 9

 Here is a tower of dice which can be viewed all the way round (all four sides and the top).

Can you calculate the total number of dots that you cannot see?

Entries must be emailed with your name and form to mathschallenge@ucc.rutland.sch.uk by Friday 8th May.  First 10 correct answers will be announced in notices. Winners will receive House Points.