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Which number produces an irrational number when added to 0.4
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Which number produces an irrational number when added to 0.4

User Niall
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You didn't provide answer choices, but since 0.4=4/10 is rational, adding any irrational value to it will produce and irrational sum.

An irrational number is any number which can not be expressed as a fraction of two integers.
User Dsimcha
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