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  1. The product of two numbers is 120. The sum of their squares is 289. The sum of the two numbers is ?
    1. 20
    2. 23
    3. 169
    4. None of these
Correct Option: B

Let the number be a and b .
Then, (a+b)2 = a2 + b2 + 2ab
= 289 + 2 x 120
= 289 + 240
= 529
∴ a+b = √529 = 23


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