ERJ Brainteaser: August
10 Aug 2026
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: Numerical order
318, 342, 366, 474, 586, 826, ?
Clues: Multiply, Add…
Email your answer: correct replies on Friday.
Question 1 – All out!
Clues: 3 X 20: 3 X 20; …
(Not a mathematical sequence)
Answer: Apologies to most readers, as this teaser did require some knowledge of scoring in darts. That said, we did have brilliant correct answers (Solutions below) from: Hans-Bernd Luechtefeld, consultant, Germany; followed soon after by Andy Longdon, technical sales manager, Ceetak Ltd, Bedford UK. Extra well done to both, and everyone else who had a throw.
SOLUTIONS
Hans-Bernd Luechtefeld
STAR ANSWER: Early day 1 - Brilliant!
Correct answer: "The Big Fish" ?
Thank you for your clue "All out". In darts, a high finish (or high checkout) is a checkout of 101 or more in a single visit of three darts.
The highest scores with typical route:
170 = T20 – T20 – Bull ("Big Fish")
167: T20 – T19 – Bull
164: T20 – T18 – Bull
161: T20 – T17 – Bull
160: T20 – T20 – D20
158: T20 – T20 – D19
157: T20 – T19 – D20
156: T20 – T20 – D18
155: T20 – T19 – D19
154: T20 – T18 – D20
153: T20 – T19 – D18
152: T20 – T20 – D16
151: T20 – T17 – D20
150: T20 – T18 – D18
Andy Longdon
In darts, these are 3 dart check-out possibilities where the final dart must be a double or the bullseye:
...158, 160, 161, 164, 167, ?.
158 = treble 20, treble 20, double 19 or treble 20, treble 16, bull
160 = treble 20, treble 20, double 20
161 = treble 20, treble 17, bull or treble 19, treble 18, bull
164 = treble 20, treble 18, bull or treble 19, treble 19, bull
167 = treble 20, treble 19, bull
So 170 is the missing number and highest possible 3 dart check-out:
170 = treble 20, treble 20, bull.
New (more open) teaser on Monday.
