Skip main navigation

Barcode alien challenge

Dr. Yossi Elran presents the barcode section of the alien challenge
We have got to the time of the course where we meet our alien challenge again. Well, we’ve nearly finished the alien challenge. We only have the last row. This is what we’ve learned so far. I times KINGJO equals JOKING, where I = 4 We deciphered this to mean 4 times 142857 = 571,428 and this is a cyclic number if you recall. We also know that 7 in a house is equal to 142, 857 which is equal to 7 in a house - this is just the Gray code for 7. and that’s equal to - in Gray code - this number is equal to 999,999 divided by 7. And now we have the last row.
7 in a house times 7 equals a barcode. Can you decipher the barcode?

We return to the course challenge! Decipher the following barcode:

Course challenge barcode

You might want to flip back to the barcode page for help…

PS: Aliens are known to use the first digit of the barcode to signify Tesha the planet they come from (the single digit code for Tesha is 9), and they also use checksum digits, so once you have the answer you can ignore the first and last digits

This article is from the free online

Maths Puzzles: Cryptarithms, Symbologies and Secret Codes

Created by
FutureLearn - Learning For Life

Our purpose is to transform access to education.

We offer a diverse selection of courses from leading universities and cultural institutions from around the world. These are delivered one step at a time, and are accessible on mobile, tablet and desktop, so you can fit learning around your life.

We believe learning should be an enjoyable, social experience, so our courses offer the opportunity to discuss what you’re learning with others as you go, helping you make fresh discoveries and form new ideas.
You can unlock new opportunities with unlimited access to hundreds of online short courses for a year by subscribing to our Unlimited package. Build your knowledge with top universities and organisations.

Learn more about how FutureLearn is transforming access to education