ERJ Brainteaser: September
9 Sep 2024
Each month, ERJ sets a weekly brainteaser, with questions of varying degrees of difficulty. Readers supplying the most accurate (and stylish) answers are then considered for the prestigious Brainiac of the Month title.
Question 2: Secret combination
Veronica has worked out a new four-digit number for the combination lock on her bicycle. This is coded A, B, C, D, with each letter representing a different digit from 1 to 9. If this number is divisible by 13, BCDA is divisible by 11, CDAB is divisible by 9, and DABC is divisible by 7, what is the original number ABCD?
Email your answer: correct replies on Friday*.
*Apologies: Our question-setters are away at a conference this week, so the results of this Brainteaser will be now announced on Monday.
Question 1: Score board
60, 57, 54, 51, ?, ...
Answer: Seems not every reader is familiar with the scoring in a game of darts - apologies if so. These are the highest scores you can get with a single dart-throw, in descending order - ie treble 20, 19, 18... etc. Very well done for hitting the bullseye (50) to: Andrew Knox, Rubbond International, Ohé en Laak, The Netherlands; John Coleman, membership manager, Circol ELT, Dublin, Ireland; Sudi Sudarshan, principal consultant, Global Mobility Strategies, USA; Kamila Staszewska, R&D / quality lead, Abcon Industrial Products Ltd, Cootehill, Co. Cavan, Ireland.
