ERJ Brainteaser: October
5 Oct 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 1: Easy rider
A motorbike is moving along a straight horizontal road with constant acceleration. There are three points X, Y and Z, in that order, on the road, where XY = 22 metres and YZ = 104 metres. If the motorbike takes 2 seconds to travel from X to Y and 4 seconds to travel from Y to Z, what is a) its acceleration and b) speed just as it passes point X?
Email your answer: correct replies on Friday.
