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11 lines
389 B
Ruby
11 lines
389 B
Ruby
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# A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99.
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# Find the largest palindrome made from the product of two 3-digit numbers.
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answer = 0
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999.downto(99) do |i|
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999.downto(99) do |j|
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t = (i * j)
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answer = i * j if (t.to_s == t.to_s.reverse) && (t > answer) && (t > answer)
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end
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end
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puts answer
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