what's the biggest integer that can not be made up by 6, 9, and 20?
158642
Available in 6-packs, 9-packs, 20-packs
103545
Prove "casting out nines" of an integer is equivalent to that integer modulo 9
42706
How many $N$ digits binary numbers can be formed where $0$ is not repeated
157954
How many digits does the integer zero have?
148567
Given $a,b$, what is the maximum number which can not be formed using $na + mb$?
33792
Numbers to the Power of Zero
108748
Why there are real numbers with infinite digits, but no such natural numbers (or another reason why real numbers are uncountable)
108919
Numbers till 400 divisible by 2, 3, 5, 7
130866
The best symbol for non-negative integers?
97005
A number smaller than negative infinity in python?
136616
integer constant is too large for "long" type
151007
Clarification about "int" number that begins with 0
64592
The last two digits of $9^{9^9}$
36757
I can't determine the maximum natural number which is unable to be represented as $17\times x+23\times y$
112446
How do you deal with numbers larger than UInt64 (C#)
28470
What is the largest value not attained by coins worth $\$0.25$ and $\$0.29$? (Frobenius Coin Problem)
63315
Limit to infinity and infinite logarithms?