How many three digits numbers are there such that there is no $1$ adjacent to $2$ on the right side?
122937
There is a number of three digits, 1 is never immediate right of 2 is?
32039
What are the trailing number of the zeroes in the given integer
93459
Number of permutations of unspecified length
148703
Permutations with repeating digits
35515
Find the number of $(m+n)$ digit binary sequences with $m$ $0$'s and $n$ $1$'s such that no two $1$'s are adjacent
27538
Last Two Digits Problem
78407
Are there infinitely-many numbers that are both square and triangular?
90952
Does every number not ending with zero have a multiple without zero digits at all?
80327
Last digits, numbers
150652
Number of 4-digit numerals with at most 2 different digits
6204
How many permutations of $\{1, \ldots, n\}$ exist such that none of them contain $(i, i+1)$ (as a sequence) for $i \in {1,...,(n-1)}$?
71098
number of table with $1$ and $-1$
42795
Number of bit strings with 3 consecutive zeros or 4 consecutive 1s
128220
How many five-digit numbers can be formed using digits $0, 1, 2, 6, 7, 8,9$ which are divisible by $3$ and $5$?
42706
How many $N$ digits binary numbers can be formed where $0$ is not repeated
472
In how many ways can $3$ red, $3$ blue, and $3$ green balls be arranged so that no two balls of the same colour are consecutive (up to symmetry)?
13260
Choosing $101$ numbers from $\{1, 2, \dots , 200\}$.