Problems

1 – 34 of 34

Problem Title Likes Solvers Difficulty

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

Created by: Riam Su

Tags projecteuler

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

Created by: James

Tags projecteuler, powers, snap!

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

Created by: Doug Hull

Tags projecteuler, basic matlab

957

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

Created by: Doug Hull

Tags projecteuler

1295

Problem 42754. Odd elimination

Created by: Zikobrelli

Tags projecteuler

Problem 2721. Pandigital Factors (Based on Euler 491)

Created by: James

Tags projecteuler, pandigital

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

Created by: James

Tags projecteuler

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

Created by: Doug Hull

Tags projecteuler

1886

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

Created by: @bmtran (Bryant Tran)

Tags projecteuler, plus15, poor_problem_statement

180

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

Created by: @bmtran (Bryant Tran)

Tags projecteuler, plus15

Problem 241. Project Euler: Problem 7, Nth prime

Created by: Doug Hull

Tags primes, projecteuler

766

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

Created by: Jean-Marie Sainthillier

Tags xor, projecteuler, encryption

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

Created by: James

Tags projecteuler, you better move, you better dance

Problem 42935. Sums of cubes and squares of sums

Created by: John D'Errico

Tags integers, projecteuler, numbers

145

Problem 2664. Divisors for big integer

Created by: Jean-Marie Sainthillier

Tags projecteuler, divisors

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

Created by: Doug Hull

Tags projecteuler, fibonacci

1194

Problem 239. Project Euler: Problem 5, Smallest multiple

Created by: Doug Hull

Tags projecteuler

630

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

Created by: Doug Hull

Tags projecteuler

532

Problem 44732. Highly divisible triangular number (inspired by Project Euler 12)

Created by: goc3

Tags series, triangle, projecteuler

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

Created by: James

Tags projecteuler, self-referential, golomb sequence

117

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

Created by: Doug Hull

Tags projecteuler

648

Problem 249. Project Euler: Problem 9, Pythagorean numbers

Created by: Doug Hull

Tags projecteuler

505

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

Created by: Riam Su

Tags projecteuler, euler

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

Created by: Ramon Villamangca

Tags easy, sequences, projecteuler

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

Created by: James

Tags projecteuler, pandigital, cody5

Problem 235. Project Euler: Problem 4, Palindromic numbers

Created by: Doug Hull

Tags projecteuler

459

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

Created by: James

Tags primes, projecteuler, circular reasoning

251

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

Created by: James

Tags projecteuler, square root

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

Created by: Riam Su

Tags projecteuler

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

Created by: @bmtran (Bryant Tran)

Tags projecteuler, plus15

836

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

Created by: James

Tags projecteuler, diophantine, pell equation

Problem 44793. Project Euler 249: Prime Subset Sums

Created by: li haitao

Tags projecteuler

Problem 44448. Project Euler: Problem 14 Longest Collatz sequence

Created by: li haitao

Tags projecteuler, speed optimization

Problem 45429. Prime Sum

Created by: Asif Newaz

Tags primes, projecteuler, euler

1 – 34 of 34

Trial software

Difficulty Rating

Problem Groups

Problems

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

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

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

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

Problem 42754. Odd elimination

Problem 2721. Pandigital Factors (Based on Euler 491)

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

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

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

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

Problem 241. Project Euler: Problem 7, Nth prime

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

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

Problem 42935. Sums of cubes and squares of sums

Problem 2664. Divisors for big integer

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

Problem 239. Project Euler: Problem 5, Smallest multiple

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

Problem 44732. Highly divisible triangular number (inspired by Project Euler 12)

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

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

Problem 249. Project Euler: Problem 9, Pythagorean numbers

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

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

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

Problem 235. Project Euler: Problem 4, Palindromic numbers

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

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

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

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

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

Problem 44793. Project Euler 249: Prime Subset Sums

Problem 44448. Project Euler: Problem 14 Longest Collatz sequence

Problem 45429. Prime Sum