Problems

1 – 35 of 35

Problem Title Likes Solvers Difficulty

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 42937. Project Euler: Problem 14, Longest Collatz sequence

Created by: Riam Su

Tags projecteuler

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

Created by: Doug Hull

Tags projecteuler

2321

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

230

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

Created by: Doug Hull

Tags projecteuler, basic matlab

1893

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

Created by: James

Tags projecteuler, powers, snap!

126

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

Created by: James

Tags projecteuler, you better move, you better dance

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

Created by: Doug Hull

Tags projecteuler

3376

Problem 2664. Divisors for big integer

Created by: Jean-Marie Sainthillier

Tags projecteuler, divisors

150

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

Created by: @bmtran (Bryant Tran)

Tags projecteuler, plus15

100

Problem 42935. Sums of cubes and squares of sums

Created by: John D'Errico

Tags integers, projecteuler, numbers

266

Problem 241. Project Euler: Problem 7, Nth prime

Created by: Doug Hull

Tags primes, projecteuler

1565

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

Created by: goc3

Tags series, triangle, projecteuler

118

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

Created by: James

Tags projecteuler, self-referential, golomb sequence

163

Problem 239. Project Euler: Problem 5, Smallest multiple

Created by: Doug Hull

Tags projecteuler

1503

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

Created by: Jean-Marie Sainthillier

Tags xor, projecteuler, encryption

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

Created by: Cody Team

Tags projecteuler, fibonacci

2500

Problem 249. Project Euler: Problem 9, Pythagorean numbers

Created by: Doug Hull

Tags projecteuler

1299

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

Created by: Doug Hull

Tags projecteuler

1198

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

Created by: Doug Hull

Tags projecteuler

1595

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

Created by: Riam Su

Tags projecteuler, euler

103

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

Created by: Riam Su

Tags projecteuler

Problem 235. Project Euler: Problem 4, Palindromic numbers

Created by: Doug Hull

Tags projecteuler

1146

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

Created by: James

Tags primes, projecteuler, circular reasoning

569

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

Created by: James

Tags projecteuler, pandigital, cody5

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

Created by: Ramon Villamangca

Tags easy, sequences, projecteuler

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

Created by: @bmtran (Bryant Tran)

Tags projecteuler, plus15

1888

Problem 44793. Project Euler 249: Prime Subset Sums

Created by: li haitao

Tags projecteuler

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

Created by: James

Tags projecteuler, square root

Problem 45429. Prime Sum

Created by: Asif Newaz

Tags primes, projecteuler, euler

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

Created by: James

Tags projecteuler, diophantine, pell equation

Problem 44448. Project Euler: Problem 14 Longest Collatz sequence

Created by: li haitao

Tags projecteuler, speed optimization

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

Created by: Ramon Villamangca

Tags easy, projecteuler, number theory

1 – 35 of 35

Filter By

Difficulty Rating

Problem Groups

Problems

Problem 42754. Odd elimination

Problem 2721. Pandigital Factors (Based on Euler 491)

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

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

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

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

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

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

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

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

Problem 2664. Divisors for big integer

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

Problem 42935. Sums of cubes and squares of sums

Problem 241. Project Euler: Problem 7, Nth prime

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

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

Problem 239. Project Euler: Problem 5, Smallest multiple

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

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

Problem 249. Project Euler: Problem 9, Pythagorean numbers

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

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

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

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

Problem 235. Project Euler: Problem 4, Palindromic numbers

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

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

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

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

Problem 44793. Project Euler 249: Prime Subset Sums

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

Problem 45429. Prime Sum

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

Problem 44448. Project Euler: Problem 14 Longest Collatz sequence

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