Numbers - Hard

Some more numbers of note, but harder this time.

Quiz by

Rate:

Last updated: November 5, 2025

You have not attempted this quiz yet.

More quiz info >>

6:00

Enter answer here

/ 10 guessed

The quiz is paused. You have remaining.

Copied!

Scoring

You scored / = %

This beats or equals % of test takers also scored 100%

The average score is

Your high score is

Your fastest time is

Keep scrolling down for answers and more stats ...

Hint	Answer
A quaternion with every coefficient equal to 1	1 + i + j + k
The smallest number greater than all natural numbers	ω
The third Mersenne prime	31
The factorial of 6	720
A number than can never be reached by exponentiation of real numbers except by using itself as the base	0

Hint	Answer
A number smaller than all real numbers yet larger than 0	ε
The first number that is semiprime and a Fibonacci number	21
The number 115 in hexadecimal	73
The cardinality of the set of natural numbers	ℵ₀
The value of e to the power of i times pi	-1