| Special square |
500 |
56 |
Number-Theory,
Squares
|
| Viet said |
500 |
110 |
Number-Theory
|
| Lin does shopping |
200 |
30 |
Algebra,
Number-Theory
|
| Relatively prime with 2020 |
200 |
244 |
Number-Theory,
Prime-Numbers
|
| Odd divisors |
300 |
91 |
Number-Theory,
Divisors
|
| Positive product of sums |
300 |
75 |
Algebra,
Equations,
Number-Theory
|
| Interesting functions |
600 |
12 |
Number-Theory
|
| All such |
400 |
68 |
Number-Theory,
Equations
|
| Tricky sequence |
500 |
30 |
Number-Theory,
Algebra,
Sequences
|
| Divisibility by 4 |
200 |
236 |
Number-Theory,
Digits
|
| x[x] |
400 |
58 |
Number-Theory,
Floor-Function
|
| 335577 |
500 |
35 |
Number-Theory,
Powers
|
| Progressive sequence |
500 |
18 |
Algebra,
Number-Theory,
Sequences
|
| !Fancy sequence |
600 |
8 |
Combinatorics,
Number-Theory
|
| Almost squared numbers |
300 |
49 |
Number-Theory
|
| Exactly two roots |
400 |
50 |
Number-Theory,
Equations
|
| Arithmetic derivative |
500 |
42 |
Number-Theory,
Functions
|
| Tricky |
400 |
61 |
Number-Theory
|
| Squared fours |
200 |
209 |
Number-Theory,
Algebra
|
| NRD pair |
200 |
97 |
Number-Theory,
Prime-Numbers
|
| Reverse Product |
400 |
36 |
Combinatorics,
Number-Theory
|
| VNT |
500 |
97 |
Number-Theory,
LTE
|
| Rational Irrational |
300 |
34 |
Algebra,
Number-Theory
|
| Powered Numbers (Duplicate) |
300 |
51 |
Algebra,
Number-Theory
|
| U turn |
200 |
150 |
Algebra,
Number-Theory,
Digits
|
| Difference of squares |
200 |
51 |
Combinatorics,
Number-Theory
|
| Simple Altai |
400 |
19 |
Number-Theory
|
| Base4 |
300 |
33 |
Number-Theory
|
| Small triangular numbers |
200 |
137 |
Algebra,
Number-Theory
|
| Powered Numbers |
300 |
51 |
Algebra,
Number-Theory
|
| Sum of Digits |
200 |
73 |
Number-Theory,
Digits
|
| Uneven numbers |
100 |
144 |
Number-Theory
|
| Irreducible Fractions |
200 |
87 |
Number-Theory
|
| Smallest fraction |
300 |
27 |
Algebra,
Number-Theory
|
| Cool-divisble numbers |
300 |
69 |
Number-Theory,
Digits
|
| Concatenate |
500 |
15 |
Number-Theory
|
| Sum of digits 2020 |
200 |
153 |
Number-Theory,
Digits
|
| Interesting permutations |
600 |
6 |
Number-Theory
|
| Math lesson |
400 |
41 |
Number-Theory,
Combinatorics
|
| Cube Cube Square |
300 |
28 |
Algebra,
Number-Theory
|
| Binary Sum |
500 |
27 |
Number-Theory,
Algebra
|
| !Fancy cubic |
300 |
68 |
Algebra,
Number-Theory
|
| Five Primes |
100 |
148 |
Number-Theory
|
| Not constant |
300 |
28 |
Algebra,
Number-Theory
|
| Mathrix |
600 |
5 |
Algebra,
Number-Theory,
Matrices
|
| Quadratic |
300 |
49 |
Algebra,
Number-Theory
|
| Factorial Factor |
200 |
63 |
Number-Theory,
Combinatorics
|
| Cuboid |
300 |
27 |
Number-Theory
|
| Sequence |
300 |
46 |
Number-Theory
|
| Prime Sets |
500 |
8 |
Combinatorics,
Number-Theory
|
| Flip |
200 |
65 |
Algebra,
Number-Theory,
Digits
|
| Unordered triplet |
300 |
52 |
Algebra,
Number-Theory
|
| Nice Integer |
400 |
5 |
Number-Theory,
Algebra,
Polynomials
|
| Good Order |
600 |
3 |
Algebra,
Number-Theory
|
| Lin's Numbers |
400 |
32 |
Number-Theory,
Algebra
|
