If you multiple 37 by 3y you will get a three-digit number that is all y's. For example, 37 x (3 x 1) = 111 and 37 x (3 x 7) = 777.
The same applies with 15,873 and 7y, and 8,547 and 13y.
These are known as Magic Numbers.
The puzzle is to find the smallest Magic Number for 17. That is the smallest number that when multiplied by 17y produces a number in which every digit is y.
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