ERJ Brainteaser - January
5 Jan 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: Next numbers
10/4 = 100
30/5 = 150
19/7 = 200
?/? = ?
Email your answer: correct replies on Friday
along with the winners of the prestigious
Brainiac of the Year Awards
