Solved IB ACIO Question
A solved IB ACIO PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Series (Numeric and Alphanumeric)medium · 45s
Find the next number: 13, 17, 23, 31, 41, ...?
TopicSeries (Numeric and Alphanumeric)
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.25
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
The series consists of prime numbers starting from 13. After 41, the next prime is 43, then 47, 53. Since 41 is the fifth prime listed (13-2nd, 17-3rd, 23-4th, 31-5th, 41-6th), the next should be the 7th prime after 41, which is 53.
Final Answer: Option B - 53