1. Classical
  2. Challenge
  3. Partial
  4. Tutorial
  5. Riddle
  6. Basics
  7. #tags

ID NAME QUALITY USERS ACC % DIFFICULTY C I
30757 Ada and Carrot   6 137
17
34
32029 Ada and Connections   7 76
26
28
32840 Ada and Digits   15 182
20
18
32949 Ada and Digits 2   5 78
30
30
30739 Ada and Manure   18 315
11
22
30755 Ada and GCD   21 456
27
15
30691 Ada and Diary   3 62
9
9
30737 Ada and Homework   5 68
34
28
32683 Ada and Kohlrabi   5 73
30
13
32059 Ada and Taxes   16 113
23
23
5151 Alice’s Cube   8 516
24
21
10232 Distinct Primes   85 5927
10
9
4556 Think I will Buy Me a Football Team   30 2188
7
11
5451 Not So Flat After All   9 1127
11
10
13753 Amazing Prime Sequence   62 3359
10
12
30826 Bernoulli numbers   4 7
23
12
31066 Number Breaking   11 854
12
12
21357 Crucial Equation   80 6377
4
9
3505 Prime Number Theorem   25 1538
14
13
9032 Cube Free Numbers   65 4165
12
11
526 Divisors   38 1712
14
13
530 Divisors 2   10 933
12
16
22403 Divisors of factorial   71 1978
14
14
74 Divisor Summation   94 16711
7
10
23963 Easy Factorials   10 118
27
26
4141 Euler Totient Function   147 11989
8
11
22382 Euler Totient Function Depth   24 395
15
16
4942 Integer Factorization (15 digits)   45 3666
11
11
33046 Factorial Modulo Prime   4 32
46
42
25584 Factorial Modulo   25 425
10
15
25067 Fibonacci Polynomial   8 238
11
19
5970 Finding Primes   22 1344
16
15
6264 Rank of a Fraction   4 131
12
34
5978 Frequent Prime Ranges   10 717
14
14
3871 GCD Extreme   82 3067
19
26
41657 GCD Goodness   2 29
17
26
26045 GCD OF MATRIX (hard)   4 138
42
29
41507 GCD Product Sum   8 51
9
21
12005 Grass Planting   11 604
29
19
18202 HUGE GCD   17 686
14
13
4164 A conjecture of Paul Erdős   24 2643
16
15
12241 Classification from Erdős and Selfridge   5 32
28
28
27195 Find The Number   7 217
20
17
6221 Increasing Powers of K   4 359
24
34
6256 Inversion Count   534 18008
16
18
40083 Just Primes   11 122
15
17
40084 Just Primes II   7 29
34
30
12183 Help the Commander in Chief   46 914
15
16
34812 Kth Power Summation   6 61
25
19
3442 The last digit   190 30050
9
8

#number-theory

The problem involves number theory, a branch of pure mathematics

https://en.wikipedia.org/wiki/Number_theory http://mathworld.wolfram.com/NumberTheory.html http://www.math.brown.edu/~jhs/frintch1ch6.pdf http://www.britannica.com/topic/number-theory


© Spoj.com. All Rights Reserved. Spoj uses Sphere Engine™ © by Sphere Research Labs.