Problems

1 – 14 of 14

Problem Title Likes Solvers Difficulty

Problem 1012. Determine if input is a perfect number

Created by: Binbin Qi

Tags mod sum, perfect

156

Problem 1008. Determine if input is a Narcissistic number

Created by: Binbin Qi

Tags mod floor

133

Problem 170. First N Perfect Squares

Created by: @bmtran (Bryant Tran)

Tags math, perfect squares, integers

691

Problem 1407. Is it an Armstrong number?

Created by: Harish Maradana

Tags armstrong no

241

Problem 1162. Happy 2013...

Created by: James

Tags new year, different digits, 2013

133

Tags primes

331

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

Created by: @bmtran (Bryant Tran)

Tags projecteuler, plus15

Problem 525. Mersenne Primes

Created by: Drew Weymouth

Tags math, prime, integers

350

Problem 365. Numbers with prime factors 2, 3 and 5.

Created by: elias GR

Tags primes, factors

282

Problem 249. Project Euler: Problem 9, Pythagorean numbers

Created by: Doug Hull

Tags projecteuler

491

Problem 1477. Champernowne Constant

Created by: G K

Tags math

Problem 273. Recurring Cycle Length (Inspired by Project Euler Problem 26)

Created by: @bmtran (Bryant Tran)

Tags project euler, digits, decimals

1 – 14 of 14

Trial software

Difficulty Rating

Problem Groups

Problems

Problem 1012. Determine if input is a perfect number

Problem 1008. Determine if input is a Narcissistic number

Problem 170. First N Perfect Squares

Problem 1407. Is it an Armstrong number?

Problem 1162. Happy 2013...

Problem 1281. Fermat's Last Theorem - Fermat's conjecture

Problem 1298. P-smooth numbers

Problem 1096. Largest Twin Primes

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

Problem 525. Mersenne Primes

Problem 365. Numbers with prime factors 2, 3 and 5.

Problem 249. Project Euler: Problem 9, Pythagorean numbers

Problem 1477. Champernowne Constant

Problem 273. Recurring Cycle Length (Inspired by Project Euler Problem 26)