How many zeros are in one million?
Answer6
One million is written 1,000,000.
Challenge · Facts & stats
Number facts & stats
7 fact-checked facts about numbers, math facts and number puzzles, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What number does the Roman numeral C represent?
Answer100
C stands for 100, from the Latin centum.
Going deeper
Which of these is a perfect number?
Answer28
28 equals the sum of its proper divisors: 1, 2, 4, 7 and 14.
A googol equals 10 raised to which power?
Answer100
A googol is 1 followed by 100 zeros.
What is the value of 0 factorial?
Answer1
By definition, 0! equals 1.
Expert level
Euler's number e is approximately what?
Answer2.718
e, the base of natural logarithms, is about 2.71828.
The golden ratio is approximately what?
Answer1.618
The golden ratio, phi, is about 1.618.
Know these cold?Today's round is five questions like these, 20 seconds each. Your streak and level follow you to every arena.Play today's round