GitHub - kariannemah/project_euler: Project Euler solutions

Solutions in Ruby to selected Project Euler problems.

A few of them include tail-recursive methods, which make use of tail call optimzation (TCO). One must enable TCO before using it since Ruby MRI disables this functionality by default. Here's a comprehensive take on tail call optimization in Ruby.

Name		Name	Last commit message	Last commit date
Latest commit History 21 Commits
10_summation_of_primes.rb		10_summation_of_primes.rb
119_digit_power_sum.rb		119_digit_power_sum.rb
120_square_remainders.rb		120_square_remainders.rb
125_palindromic_sums.rb		125_palindromic_sums.rb
12_highly_divisible_triangle_number.rb		12_highly_divisible_triangle_number.rb
13_large_sum.rb		13_large_sum.rb
14_longest_collatz_sequence.rb		14_longest_collatz_sequence.rb
15_lattice_paths.rb		15_lattice_paths.rb
16_power_digit_sum.rb		16_power_digit_sum.rb
17_number_letter_counts.rb		17_number_letter_counts.rb
19_counting_sundays.rb		19_counting_sundays.rb
1_multiples_of_3_and_5.rb		1_multiples_of_3_and_5.rb
20_factorial_digit_sum.rb		20_factorial_digit_sum.rb
22_names_score.rb		22_names_score.rb
24_lexicographic_permutations.rb		24_lexicographic_permutations.rb
25_thousand_digit_fibonacci_number.rb		25_thousand_digit_fibonacci_number.rb
27_quadratic_primes.rb		27_quadratic_primes.rb
29_distinct_powers.rb		29_distinct_powers.rb
2_even_fibonacci_numbers.rb		2_even_fibonacci_numbers.rb
30_digit_fifth_powers.rb		30_digit_fifth_powers.rb
33_digit_cancelling_fractions.rb		33_digit_cancelling_fractions.rb
34_digit_factorials.rb		34_digit_factorials.rb
35_circular_primes.rb		35_circular_primes.rb
36_double_base_palindromes.rb		36_double_base_palindromes.rb
37_truncatable_primes.rb		37_truncatable_primes.rb
38_pandigital_multiples.rb		38_pandigital_multiples.rb
39_integer_right_triangles.rb		39_integer_right_triangles.rb
3_largest_prime_factor.rb		3_largest_prime_factor.rb
41_pandigital_prime.rb		41_pandigital_prime.rb
42_coded_triangle_numbers.rb		42_coded_triangle_numbers.rb
43_substring_divisibility.rb		43_substring_divisibility.rb
44_pentagon_numbers.rb		44_pentagon_numbers.rb
45_triangular.rb		45_triangular.rb
46_goldbach.rb		46_goldbach.rb
47_distinct_prime_factors.rb		47_distinct_prime_factors.rb
48_self_powers.rb		48_self_powers.rb
49_prime_permutations.rb		49_prime_permutations.rb
4_largest_palindrome_product.rb		4_largest_palindrome_product.rb
52_permuted_multiples.rb		52_permuted_multiples.rb
53_combinatoric_selections.rb		53_combinatoric_selections.rb
55_lychrel_numbers.rb		55_lychrel_numbers.rb
56_powerful_digit_sum.rb		56_powerful_digit_sum.rb
63_powerful_digit_counts.rb		63_powerful_digit_counts.rb
6_sum_square_difference.rb		6_sum_square_difference.rb
74_digit_factorial_chains.rb		74_digit_factorial_chains.rb
7_10001st_prime.rb		7_10001st_prime.rb
80_square_root_digital_expansion.rb		80_square_root_digital_expansion.rb
85_counting_rectangles.rb		85_counting_rectangles.rb
8_largest_product_in_a_series.rb		8_largest_product_in_a_series.rb
92_square_digit_chains.rb		92_square_digit_chains.rb
99_largest_exponential.rb		99_largest_exponential.rb
9_special_pythagorean_triplet.rb		9_special_pythagorean_triplet.rb
README.md		README.md
base_exp.txt		base_exp.txt
names.txt		names.txt
words.txt		words.txt

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