MBA Exam

If the roots of the equation x2 + 7x + 8 = 0 are in the ratio p : q (p > 0, q > 0), then the value of root(p/q) + root(q/p)?Bit confused with this one..please explain.

1) 7root2/4
2) -7root2/4
3) 7/4
4) cannot be determined

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MBA Other Question

I. A right angled triangle with integer sides has one side as 18 cm. Let M be the maximum possible area, and let N be the smallest possible area of this triangle. Then M- N is greater than 600 sq. cm II. A square of maximum possible area is put inside an equilateral triangle of side (2+3^1/2) cm. The area of the circle inscribed within this square is less than 2 sq. unitsWhich of the above two statement(s) is/are true?

1) Only II
2) Both I and II
3) Only I
4) None of these
The number 523abc is divisible by 7,8 and 9. Then a*b*c is?With explanation of course..

1) 180
2) 10
3) 120
4) 240