Weekly Brain Quiz
Memory, logic, and mental math — a weekly workout.
The weekly brain quiz is a free ten-question quiz refreshed every Monday. The current edition is week 27, 2026; all previous editions remain playable in the archive.
What the Weekly Brain Quiz covers
Think of this as circuit training for cognition. Each weekly edition rotates through mental math, sequence logic, memory challenges, and estimation problems — short exercises drawn from the puzzle traditions cognitive scientists actually study.
The honest science: quizzes will not raise your IQ, but regular retrieval and mental arithmetic measurably improve at the skills you practise. Ten minutes a week keeps those circuits warm.
Questions escalate in difficulty within each edition, ending with one problem designed to be solved by fewer than one player in five.

Key topics in rotation
Questions in this category regularly draw on: mental math, memory, logic puzzles, cognition, brain training. Each weekly edition mixes six Brain questions with four bonus questions from neighbouring categories, so the round never becomes predictable.
Recent Brain quizzes
Brain · 2026 · WK 27
29 Jun – 05 Jul 2026 · 10 questions with answers
Brain · 2026 · WK 26
22 Jun – 28 Jun 2026 · 10 questions with answers
Brain · 2026 · WK 25
15 Jun – 21 Jun 2026 · 10 questions with answers
Brain · 2026 · WK 24
08 Jun – 14 Jun 2026 · 10 questions with answers
Brain · 2026 · WK 23
01 Jun – 07 Jun 2026 · 10 questions with answers
Brain · 2026 · WK 22
25 May – 31 May 2026 · 10 questions with answers
Brain · 2026 · WK 21
18 May – 24 May 2026 · 10 questions with answers
Brain · 2026 · WK 20
11 May – 17 May 2026 · 10 questions with answers
Brain · 2026 · WK 19
04 May – 10 May 2026 · 10 questions with answers
Brain · 2026 · WK 18
27 Apr – 03 May 2026 · 10 questions with answers
Brain · 2026 · WK 17
20 Apr – 26 Apr 2026 · 10 questions with answers
Brain · 2026 · WK 16
13 Apr – 19 Apr 2026 · 10 questions with answers
FAQs — Weekly Brain Quiz
Is the Weekly Brain Quiz free to play?
Yes — every quiz on this site is free, requires no account, and stores no personal data. Your score is calculated in your browser and never leaves it.
Who writes and checks the Brain questions?
The Weekly Quiz editorial process requires every answer to be verifiable against at least two reliable reference sources before publication — see our fact-checking policy.
When is the Weekly Brain Quiz for week 27, 2026 published?
Each edition goes live on Monday morning and covers the ISO week week 27, 2026 (29 Jun – 05 Jul 2026). It stays online permanently in the archive, so late players lose nothing.
Can I replay the week 27, 2026 edition?
Reload the page and the quiz resets. Because scores are never stored, replaying is always a clean slate.
Can I see the answers for the week 27, 2026 Brain quiz without playing?
Yes. Scroll to the printed answer key below the interactive quiz — each answer is listed with a short explanation of why it is correct.
What is a good score on the Brain quiz for week 27, 2026?
Six out of ten is a solid pass, eight or more puts you well above the typical player, and a perfect ten is genuinely uncommon on this edition.
How long does the week 27, 2026 Brain quiz take?
Most players finish in three to five minutes. There is no timer, so you can take as long as you like.
Is there a harder version of this quiz?
Yes — the Weekly Challenge Quiz collects the toughest questions across all categories into one expert round each week.
How is this different from last week's Brain quiz?
The question selection, option order, and mixed-in bonus questions all rotate weekly, so the week 27, 2026 edition is a distinct set from the week before.
How were the questions for week 27, 2026 chosen?
Questions rotate through a fact-checked bank on a weekly schedule, so no two consecutive weeks repeat the same set in the same order.
What happens if I answer a question wrong?
The correct option is highlighted immediately and a one-line explanation appears, so a wrong answer still teaches you the fact.
Does the Brain quiz work on mobile?
Yes — the quiz is a lightweight static page that works on any modern phone browser, with large tap targets and no app required.