Four $2$'s to make $7$
64985
Get the numbers from (0-30) by using the number $2$ four times
15725
$2017$ as the sum of two squares
7000
Expected time to roll all 1 through 6 on a die
97265
count the ways to fill a $4\times n$ board with dominoes
29238
Making Change for a Dollar (and other number partitioning problems)
149961
Two digit numbers
24370
Dominos ($2 \times 1$ on $2 \times n$ and on $3 \times 2n$)
83973
Coin flipping probability game ; 7 flips vs 8 flips
95196
No simple group of order $300$
38020
In how many ways $5$ different rings can be worn on $4$ fingers?
91389
If I roll three dice at the same time, how many ways the sides can sum up to $13$?
90592
Profitable strategy in coin tossing?
102349
sum of all the numbers that can be formed using the digits 2,3,3,4,4,4..
74804
In how many ways can $7$ girls and $3$ boys sit on a bench in such a way that every boy sits next to at least one girl
65070
Combinations of a penny, nickel, dime, and quarter
53126
Probability of collecting all 5 buying 7 chocolates
148859
Determine $4$ specific digits in $34!$