Multiple choice

The product of two numbers is 120 and the sum of their squares is 289. The sum of the numbers is

  1. 20

  2. 23

  3. 169

  4. 170

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer. Let the numbers be x and y. 
Then, xy = 120 and x2 + y2 = 289.  (x + y)2 = x2 + y2 + 2xy               = 289 + (2 x 120)               = 529  x + y  = 23

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