Quiz Discussion

( √5 – 2)^2 = x – √80

• 1]

  9

• 2]

  7

• 3]

  6

• 4]

  10

Solve : 128.43 + 30.21 + ? = 173

• 1] 35.66
• 2] 29.66
• 3] 43.66
• 4] 24.66
• 5] 14.36

There are two examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The number of students in room A is:

• 1] 20
• 2] 80
• 3] 100
• 4] 200
• 5] None of these

If $\left( {x - \frac{1}{x}} \right){ \text{ = }}\sqrt {21} { \text{,}}$    then the value of $\left( {{x^2} + \frac{1}{{{x^2}}}} \right) \left( {x + \frac{1}{x}} \right)$ is = ?

• 1] 42
• 2] 63
• 3] 115
• 4] 120
• 5] 125

$\frac{{20 + 8 \times 0.5}}{{20 - ?}}{ \text{ = 12}}$     Find the value in place of (?)

• 1] 2
• 2] 8
• 3] 18
• 4] None of these