A radio-active substance has a half life of six months. Three-fourth of the substance will decay in ______.
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The largest source of pollution in the world is
Which among the following is not an input device?
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If {12(a-b)}2+ab=p(a+b)2, then the value of p is
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World Purple Day is observed on
World Purple Day is observed on 26 March which raises awareness about epilepsy worldwide.