Paizaラーニングの論理演算メニューのrubyでの模範解答です。
答えだけですみません。

STEP: 1 論理積( AND )の基本
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step1

step1.rb

a,b =gets.split(' ').map(&:to_i)

if a == 0 || b == 0
    puts 0
else
    puts 1
end

STEP: 2 論理和( OR )の基本
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step2

step2.rb

a,b = gets.split(' ').map(&:to_i)

if a == 1 || b == 1
    puts 1
else
    puts 0
end

STEP: 3 否定( NOT )の基本
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step3

step3.rb

a = gets.to_i

if a == 0
    puts 1
else
    puts 0
end

STEP: 4 排他的論理和( XOR )の基本
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step4

step4.rb

a,b = gets.split(' ').map(&:to_i)

if a == 1 && b == 1
    puts 0
elsif a ==1 || b == 1
    puts 1
else
    puts 0
end

STEP: 5 NAND 演算の基本
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step5

step5.rb

a,b = gets.split(' ').map(&:to_i)

if a == 1 && b == 1
    puts 0
else
    puts 1
end

STEP: 6 NOR 演算の基本
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step6

step6.rb

a,b = gets.split(' ').map(&:to_i)

if a == 0 && b == 0
    puts 1
else
    puts 0
end

STEP: 7 XNOR 演算の基本
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step7

step7.rb

a,b = gets.split(' ').map(&:to_i)

if a == 0 && b == 0
    puts 1
elsif a == 0 || b == 0
    puts 0
else
    puts 1
end

STEP: 8 半加算器
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step8

step8.rb

a,b = gets.split(' ').map(&:to_i)

if a == 1 && b == 1
    c = 1
    s = 0
elsif a == 1 || b == 1
    c = 0
    s = 1
else
    c = 0
    s = 0
end
puts "#{c} #{s}"

STEP: 9 全加算器
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_step9

step9.rb

a,b,c = gets.split(' ').map(&:to_i)


if c == 1
    if a == 1 && b == 1
        d = 1
        s = 1
    elsif a == 1 || b == 1
        d = 1
        s = 0
    else
        d = 0
        s = 1
    end
else
    if a == 1 && b ==  1
        d = 1
        s = 0
    elsif a == 1 || b == 1
        d = 0
        s = 1
    else
        d = 0
        s = 0
    end
end

puts "#{d} #{s}"

STEP:10論理演算を用いた計算のまとめ
https://paiza.jp/works/mondai/logical_operation/logical_operation__basic_boss

step10.rb

a,b,c,d = gets.split(' ').map(&:to_i)

if a == 0 && b == 0
    e = 1
else
    e = 0
end
    
if c == 0 || e == 1
    f = 0
else
    f = 1
end

if f == 1 && d == 1
    puts 0
elsif f == 1 || d == 1
    puts 1
else
    puts 0
end