In each question two equations numbered I and II are given,you haveto solve both the equation and choose the correctanswer. I. x2+ 30x + 81 = 0 II.y2-9y -162 = 0

Correct Answer: 25

Explanation:

This can be easily simplified by Approximation process

Given 39.96% of 649.85  ÷13.07 = 45.14 - ? can be written as 

40% of 650  ÷13 = 45 - ?

 

$$\begin{gathered} 40 x 650 100 13 = 45 - ? \\ ? = 45 - 20 \\ ? = 25 . \end{gathered}$$

Correct Answer: 10

Explanation:

Given equation can be written as

$$\begin{gathered} 21 5 x 10 3 + ? = 24 \\ = > 14 + ? = 24 \\ = > ? = 24 - 14 \\ = > ? = 10 \end{gathered}$$

Correct Answer: 3/7

Explanation:

$$\begin{gathered} 7 5 x 3 2 14 15 ÷ 525 100 \\ 9 4 ÷ 525 100 \\ 900 2100 \\ = 3 7 \end{gathered}$$

Correct Answer: 4/3

Explanation:

h e n c e P = 7 Q

P + Q P - Q = 7 Q + Q 7 Q - Q = 8 Q 6 Q = 4 3

Correct Answer: ? 3

Correct Answer: 35

Correct Answer: 9a^2b^2c^2

Correct Answer: 3

Correct Answer: 5

Correct Answer: 15