This week a somewhat different puzzle from our usual offerings - a puzzle about the shape of the crescent moon.
We are all familiar with the phases of the moon in our sky, as the sun illuminates half of the moon and we observe the various proportions of lit and unlit moon surface.
So, what shape is the crescent moon?
As usual you can post your suggested answers as a comment on this website, reply to the post on Facebook, or retweet or reply on Twitter @quizmastershop.
Answer at 9.00 on Monday