Monday, July 11, 2011

Problem of the Day: 7/11/2011

When Moses multiplied 2100 by a 2 digit whole number, he got a square number. Which of the following is the smallest number that gives a square number when multiplied with 2100?
84
 
48
 
21
 
24                                           
 My Response : 21       Explanation: I tried each possible solution. First, I multiplied 2100 by each number. Then, I square rooted each number for a perfect square. 2100 times 21= 44100 the square root of 44100 is a perfect number 210.
































                

No comments: