Question

m and n are integers and $\sqrt{mn}=10.$ Which of the following cannot be a value of m + n ?

• A. 25
• B. 52
• C. 101
• D. 50

Answer 1

The correct option is D 50

$\sqrt{mn}=10$
$\sqrt{100}=10$
$ifm=20thenn=5$so$20+5=25$
$ifm=50thenn=2$so$50+2=52$
$ifm=100thenn=1$so $100+1=101$
Hence option D is answer.