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
|