1 . The difference between two numbers is 7 and their product is 60, then one of the two numbers must be--

• A. 4
• B. 5
• C. 6
• D. 7

Answer: Option B

Explanation:

x - y = 7; x = (y  +  7)
xy = 60
or,(y  +  7).y = 60
or,y2+7y−60=0(y+12) (y−5)=0So,Y=−12,5So,the two number is 12 and 5