Cody

# Problems

1 – 50 of 78
 Problem Title Likes Solvers Difficulty

4

394

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

Created by: Mehmet OZC

2

284

#### Problem 2733. Evil Number

Created by: Jan Orwat

3

212

#### Problem 1826. Find vampire numbers

Created by: Andrew Newell

9

149

#### Problem 42865. Find the sum of n squares

Created by: William Mitchell

2

147

#### Problem 2734. N-th Odious

Created by: Jan Orwat

2

143

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

Created by: Jan Orwat

2

129

#### Problem 2595. Polite numbers. Politeness.

Created by: Jan Orwat

6

120

#### Problem 1771. Polygonal numbers

Created by: Jan Orwat

5

104

#### Problem 43130. Nth root

Created by: Abhishek Jain

2

89

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

Created by: Mehmet OZC

2

74

#### Problem 656. Calculate Euler's phi function

Created by: Freddy

1

74

#### Problem 1804. Fangs of a vampire number

Created by: Andrew Newell

4

65

2

56

#### Problem 2735. Binary Neighbourhood

Created by: Jan Orwat

2

50

#### Problem 2738. Sideways sum

Created by: Jan Orwat

1

47

#### Problem 1825. Find all vampire fangs

Created by: Andrew Newell

2

47

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

Created by: Jihye Sofia Seo

3

47

#### Problem 2848. Digital Neighbourhood

Created by: Jan Orwat

2

45

#### Problem 46305. find the value

Created by: Maryam HCTRAK Alhebsi

1

41

#### Problem 46287. find the answer

Created by: Maryam HCTRAK Alhebsi

1

40

#### Problem 44748. Amicable numbers

Created by: cdeliu

1

38

#### Problem 44229. How brilliant are you?

Created by: James

3

38

#### Problem 45189. Double Factorial

Created by: Mehmet OZC

2

37

#### Problem 2797. modular arithmetic

Created by: rifat

2

36

#### Problem 44065. Number of even divisors of a given number

Created by: Jihye Sofia Seo

2

34

#### Problem 46000. Compute the harmonic numbers

Created by: ChrisR

4

30

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

Created by: James

2

30

#### Problem 2370. Fermat's last theorem - again

Created by: rifat

1

28

#### Problem 2369. Tribute to Ramanujan

Created by: rifat

1

20

#### Problem 46639. Transform a Decimal number into a Septimal number

Created by: Syed Shahed

1

19

#### Problem 45224. Wythoff Sequence

Created by: Asif Newaz

2

18

#### Problem 45272. Pseudo-vampire number

Created by: Asif Newaz

2

17

#### Problem 42888. Frobenius McNugget Factorization

Created by: Ned Gulley

14

16

#### Problem 47798. Check if the input is a balanced prime

Created by: Mehmet OZC

1

16

#### Problem 46054. Count trailing zeros in a primorial

Created by: ChrisR

3

15

#### Problem 45964. Compute the nth Pythagorean prime

Created by: ChrisR

0

15

#### Problem 43179. Red and green towers

Created by: Giovanni Mottola

1

14

#### Problem 45274. Fangs of pseudo-vampire number

Created by: Asif Newaz

1

14

#### Problem 47803. Check if the input is a strong prime

Created by: Mehmet OZC

0

14

Created by: HH

2

14

#### Problem 47808. Check if the input is an interprime

Created by: Mehmet OZC

0

14

#### Problem 45388. Gapful numbers

Created by: Asif Newaz

1

13

#### Problem 46046. Determine whether a number is a cluster prime

Created by: ChrisR

3

12

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

Created by: James

1

11

#### Problem 45342. Sieve of Eratosthenes

Created by: Asif Newaz

2

11

#### Problem 45988. Evaluate the zeta function for real arguments > 1

Created by: ChrisR

1

11

#### Problem 46016. Determine digits of the Copeland-Erdos constant

Created by: ChrisR

3

11

#### Problem 46081. Set Soldner's constant

Created by: ChrisR

1

11

#### Problem 46003. Compute Khinchin's constant

Created by: ChrisR

2

10

1 – 50 of 78