A question isfollowed bydataintheform of two statements labelled as I and II. You must decide whether the data given in the Statements are sufficient to answerthe questions.
Do P, Q and R lie on a circle?
I. P, Q lie on the circle and PQ passes through its centre.
II. $$\triangle PQR$$ is right-angled.
If x is an integer, is $$9^x + 9^{-x} = b$$
I. $$3^x + 3^{-x} = \sqrt{b + 2}$$
II. $$x > 0$$
In $$\triangle ABC$$, if D is the foot of the peropendicular drawn from B onto AC, then what is the area of $$\triangle ABC$$?
I. BD.AC = 20
II. $$\angle BAD = 45^\circ$$
What is the value of k with 56 < k < 66?
I. k leaves remainder 1 when divided by 2.
II. k + 1 is divisible by 8.
Is n a prime?
I. n leaves remainder 1 when divided by 6.
II. n leaves remainder 7 when divided by 91.
Can we construct the $$\triangle ABC$$ with sides a, b and c ?
I. a = 3, b = 4
II. The perimeter of $$\triangle ABC$$ is 18.
What is the average of the numbers $$a_1, a_2, ....... a_{10}$$?
I. $$a_1 + a_2 + ..... + a_9 = 810$$
II. $$a_2 + a_3 + ..... + a_{10} = 900$$
If $$a \neq b$$ and $$c \neq d$$, what is the value of $$\frac{a^2 + d^2}{b^2 + c^2}$$?
I. $$\frac{a + b}{c - d} = \frac{c + d}{a - b}$$
II. $$ad \neq bc$$