0
$\begingroup$

This question already has an answer here:

What is the missing number represented as "?"

10,11,12,13,14,15,16,17,20,22,24, ?,100,121,10000

$\endgroup$

marked as duplicate by JMP, Rand al'Thor, Community Jul 2 at 20:38

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1
$\begingroup$

The answer is

31

Please see OEIS sequence A008713.
"16 in base 16 - n"
10, 11, 12, 13, 14, 15, 16, 17, 20, 22, 24, 31, 100, 121, 10000, 1111111111111111

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.