Mathematics Past Questions and Answers

A shopkeeper marked a phone at ₦80,000 and allowed a 5% discount. Find the amount paid.

Given that:<br/>\[<br/>U=\{1,2,3,4,5,6,7,8,9,10\}<br/>\]<br/>\[<br/>A=\{1,2,3,4,5\}<br/>\]<br/>\[<br/>B=\{4,5,6,7\}<br/>\]<br/>\[<br/>C=\{2,4,6,8,10\}<br/>\]<br/>Find:<br/>\[<br/>A' \cap (B\cup C)<br/>\]

Given:<br/>\[<br/>U=\{1,2,3,4,5,6,7,8,9\}<br/>\]<br/>\[<br/>A=\{1,3,5,7,9\}<br/>\]<br/>\[<br/>B=\{2,3,5,7\}<br/>\]<br/>Find:<br/>\[<br/>A\cap B'<br/>\]

A worker earned ₦96,000 after a salary increase of 20%. Find the former salary.

The population of a village dropped from 24,000 to 18,000. Find the percentage decrease.