How it works
These math trivia questions and answers are the grown-up pack: famous numbers, where symbols and words come from, mathematicians and firsts, shapes and solids, mental arithmetic with the working shown, and puzzles and paradoxes.
Read the full guide
Six rounds, easiest first
Famous numbers runs from a baker's dozen to 6174, the number a digit-shuffling routine always reaches. Symbols and words asks who first wrote n! and what a surd has to do with being deaf. Mental arithmetic needs no paper: each answer comes with its shortcut, such as 99 × 7 as 700 minus 7.
Print a sheet and its key
Tap a choice and the card shows the answer and the working. The questions print as a sheet for the table, and the answer key prints apart from it.
- For Pi Day, run Famous numbers and Symbols and words: both ask about pi and neither repeats the other.
- Read Puzzles and paradoxes aloud and let the table argue about the three doors before you tap.
Questions and answers
What are some easy math trivia questions?
What is 15% of 80? What is a polygon with seven sides called? What is zero factorial equal to? The answers are 12, a heptagon and 1. Every round opens with questions like these.
What are some fun math trivia questions for adults?
Try the paradoxes: how a full hotel with infinitely many rooms still takes new guests, why 0.999... is exactly 1, and why your friends have more friends than you do. All three are in the last round.
Is this the same as the math trivia for kids?
No. The kids' set on this site is written for ages 8 to 12, and this pack asks none of its questions. Googols, magic squares and the equals sign stay there; Gabriel's horn and the number 6174 are here.
How were the answers checked?
Each fact was read on October 2, 2026 in the English Wikipedia article linked under it, and every arithmetic answer was worked out again by calculation. Living mathematicians and records that a new discovery changes are left out.