Last two digits of $2^{100}$
49011
How to find last two digits of $2^{2016}$
27249
How many digits does $2^{1000}$ contain?
55053
smallest number for given sum of digits
54441
Last two digits of $3^{400}$
74102
How can I get a count of the total number of digits in a number?
36182
Why doesn't the last digit method work for divisibility by 4?
37792
Delete digits after two decimal points, without rounding the value
50110
How to check if a number is a power of 2
51299
How many digits is $99^{99}$ without a calculator?
13260
Choosing $101$ numbers from $\{1, 2, \dots , 200\}$.
70492
What is the shortest way to compute the last 3 digits of $17^{256}$?
120198
Power of two startiing with any desired sequence of digits
111962
Do the last digits of powers of a number $n$ follow the same cycle as the last digits of the number $n$'s last digit's powers?
72406
Last two digits of $2^{1000}$ via Chinese Remainder Theorem?
30989
Rounding to nearest 100
156956
Give the remainder of $x^{100}$ divided by $(x-2)(x-1)$.
61555
Rounding up to next power of 2