I got bored and came up with two methods

[Tsunokiette]

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you are creative, these can be helpful.

Finds if number is odd -

Code:

def odd?(number)
     loop do
          if number == 0
               return false
          elsif number == 1
               return true
          end
          number -= 2
     end
end

Finds if one number is divisable by another -

Code:

def divisable?(dividend,devisor)
     a = 0
     b = dividend.dup
     loop do
          if (devisor * a) > dividend
               return false
          elsif b == 0
               return true
          end
          b -= devisor
          a += 1
     end
end

Don't flame me for being the simple minded guy I am.