QuoVadis Posted July 3, 2017 Report Posted July 3, 2017 Puzzle No.1 – Monday 3 July We've got something new for you today. It's a puzzle that's been set for us by GCHQ and the kind of thing they use to recruit staff. We'll be setting a new puzzle every day so why not have go and see if you could make it as a GCHQ codebreaker. Puzzle Take the digits 1,2,3 up to 9 in numerical order and put either a plus sign or a minus sign or neither between the digits to make a sum that adds up to 100. For example, one way of achieving this is: 1 + 2 + 34 - 5 + 67 - 8 + 9 = 100, which uses six plusses and minuses. What is the fewest number of plusses and minuses you need to do this? The answer will be published on the Today website from 6am on Tuesday 4 July. source 1 Quote
