# Problems

1 – 35 of 35
 Problem Title Likes Solvers Difficulty

#### Problem 42937. Project Euler: Problem 14, Longest Collatz sequence

Created by: Riam Su

1

18

#### Problem 2721. Pandigital Factors (Based on Euler 491)

Created by: James

2

33

#### Problem 1106. I've got the power! (Inspired by Project Euler problem 29)

Created by: James

2

99

#### Problem 250. Project Euler: Problem 10, Sum of Primes

Created by: Doug Hull

6

1215

#### Problem 240. Project Euler: Problem 6, Natural numbers, squares and sums.

Created by: Doug Hull

10

1587

#### Problem 42754. Odd elimination

Created by: Zikobrelli

1

52

#### Problem 42913. Pseudo Square Root (Inspired by Project Euler 266)

Created by: James

1

39

#### Problem 1084. Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)

Created by: @bmtran (Bryant Tran)

1

196

#### Problem 230. Project Euler: Problem 1, Multiples of 3 and 5

Created by: Doug Hull

36

2326

#### Problem 1082. Lychrel Number Test (Inspired by Project Euler Problem 55)

Created by: @bmtran (Bryant Tran)

1

73

#### Problem 42394. It's going down. We're finding simbers!

Created by: James

3

59

#### Problem 2606. Decrypt the cypher using XOR encryption (for beginners)

Created by: Jean-Marie Sainthillier

2

36

#### Problem 2664. Divisors for big integer

Created by: Jean-Marie Sainthillier

2

94

#### Problem 241. Project Euler: Problem 7, Nth prime

Created by: Doug Hull

14

1041

#### Problem 42935. Sums of cubes and squares of sums

Created by: John D'Errico

7

178

Created by: goc3

1

73

#### Problem 239. Project Euler: Problem 5, Smallest multiple

Created by: Doug Hull

9

893

#### Problem 232. Project Euler: Problem 2, Sum of even Fibonacci

Created by: Dyuman Joshi

25

1552

#### Problem 1190. Golomb's self-describing sequence (based on Euler 341)

Created by: James

3

131

#### Problem 246. Project Euler: Problem 8, Find largest product in a large string of numbers

Created by: Doug Hull

4

742

#### Problem 249. Project Euler: Problem 9, Pythagorean numbers

Created by: Doug Hull

5

740

#### Problem 234. Project Euler: Problem 3, Largest prime factor

Created by: Doug Hull

9

939

#### Problem 42938. Project Euler: Problem 18, Maximum path sum I

Created by: Riam Su

3

73

#### Problem 42936. Project Euler: Problem 11, Largest product in a grid

Created by: Riam Su

4

61

#### Problem 1095. Circular Primes (based on Project Euler, problem 35)

Created by: James

7

288

#### Problem 235. Project Euler: Problem 4, Palindromic numbers

Created by: Doug Hull

5

677

#### Problem 1891. High Precision Square Root (Inspired by Project Euler 80)

Created by: James

2

22

#### Problem 52532. Easy Sequences 5: Project Euler Problem 1 - Again!

Created by: Ramon Villamangca

1

5

#### Problem 1103. Right Triangle Side Lengths (Inspired by Project Euler Problem 39)

Created by: @bmtran (Bryant Tran)

27

1145

#### Problem 1215. Diophantine Equations (Inspired by Project Euler, problem 66)

Created by: James

3

44

#### Problem 44316. Pandigital Multiples of 11 (based on Project Euler 491)

Created by: James

5

46

#### Problem 44793. Project Euler 249: Prime Subset Sums

Created by: li haitao

1

17

#### Problem 45429. Prime Sum

Created by: Asif Newaz

0

7

#### Problem 44448. Project Euler: Problem 14 Longest Collatz sequence

Created by: li haitao

2

10

#### Problem 53965. Easy Sequences 67: Project Euler Problem 1 - Not Again!!!

Created by: Ramon Villamangca

2

2

1 – 35 of 35