Problems

1 – 36 of 36

Problem Title Likes Solvers

Problem 44319. Write c^3 as sum of two squares a^2+b^2

Created by: Mehmet OZC

Tags number theory, cody5

243

Problem 1927. Find nth maximum

Created by: Awadhesh Srivastava

Tags number theory, n th max

201

Problem 2733. Evil Number

Created by: Jan Orwat

Tags pop series, number theory, easy

168

Problem 2734. N-th Odious

Created by: Jan Orwat

Tags pop series, number theory, oeis

111

Problem 2593. Polite numbers. N-th polite number.

Created by: Jan Orwat

Tags a138591, number theory

108

Problem 1826. Find vampire numbers

Created by: Andrew Newell

Tags number theory, factors

Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

Tags number theory, oeis

Problem 42865. Find the sum of n squares

Created by: William Mitchell

Tags number theory

Problem 1771. Polygonal numbers

Created by: Jan Orwat

Tags polygonal, sequence, number theory

Problem 43130. Nth root

Created by: Abhishek Jain

Tags root, nth, numbers

Problem 44289. Find two triangular numbers whose sum is input.

Created by: Mehmet OZC

Tags number theory, triangular numbers

Problem 656. Calculate Euler's phi function

Created by: Freddy

Tags basic matlab, factors, number theory

Problem 1804. Fangs of a vampire number

Created by: Andrew Newell

Tags number theory, factors

Problem 43082. Reverse digits of a number

Created by: Mohammad Haghighat

Tags math, basic matlab, numbers

Problem 2738. Sideways sum

Created by: Jan Orwat

Tags pop series, easy, number theory

Problem 1825. Find all vampire fangs

Created by: Andrew Newell

Tags number theory, factors

Problem 2735. Binary Neighbourhood

Created by: Jan Orwat

Tags pop series, number theory

Problem 2848. Digital Neighbourhood

Created by: Jan Orwat

Tags pop series, number theory

Problem 2370. Fermat's last theorem - again

Created by: rifat

Tags number theory

Problem 44229. How brilliant are you?

Created by: James

Tags brilliant, number theory, factors

Problem 2369. Tribute to Ramanujan

Created by: rifat

Tags number theory

Problem 44068. The number of trailing zero digit of a factorial

Created by: Jihye Sofia Seo

Tags factorial, integer, number theory

Problem 2797. modular arithmetic

Created by: rifat

Tags number theory

Problem 44230. I'm going to enjoy watching you calculate, Mr Anderson

Created by: James

Tags phone numbers, number theory, agent smith

Problem 42888. Frobenius McNugget Factorization

Created by: Ned Gulley

Tags number theory, factorization

Problem 44065. Number of even divisors of a given number

Created by: Jihye Sofia Seo

Tags divisor, factorisation, factor

Problem 44748. Amicable numbers

Created by: cdeliu

Tags divisors, number theory

Problem 42831. Integer complexity

Created by: HH

Tags integer, numbers, number theory

Problem 42889. Should Mr McNugget even get out of bed today?

Created by: James

Tags no nuggets for you!, number theory, factorization

Problem 43179. Red and green towers

Created by: Giovanni Mottola

Tags number theory, arithmetic

Problem 2160. The 17x17 Problem

Created by: Ned Gulley

Tags 17x17, number theory

Problem 42834. Integer complexity (Large numbers)

Created by: Peng Liu

Tags number theory, integer, complexity

Problem 2737. Prouhet–Tarry–Escott (basic)

Created by: Jan Orwat

Tags set, number theory, Magic Numbers

Problem 45189. Double Factorial

Created by: Mehmet OZC

Tags factorial, double factorial, number theory

Problem 44788. Find the right number make the equation

Created by: Binbin Qi

Tags positive number, number theory, Diophantine equations

Problem 45224. wythoff sequence

Created by: Asif Newaz

Tags sequence, number theory, wythoff

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