Quiz Discussion

A teacher wants to arrange his students in an equal number of rows and columns. If there are 1369 students, the number of students in the last row are ?

• 1] 37
• 2] 33
• 3] 63
• 4] 47

A fires 5 shots to B's 3 but A kills only once in 3 shots while B kills once in 2 shots. When B has missed 27 times, A has killed:

• 1] 30 birds
• 2] 60 birds
• 3] 72 birds
• 4] 90 birds
• 5] None of these

If $\frac{{x + 1}}{{x - 1}}{ \text{ = }}\frac{a}{b}$    and $\frac{{1 - y}}{{1 + y}}{ \text{ = }}\frac{b}{a}{ \text{,}}$ then the value of $\frac{{x - y}}{{1 + xy}}$   = ?

• 1]

  $\frac{{2ab}}{{{a^2} - {b^2}}}$

• 2]

  $\frac{{{a^2} - {b^2}}}{{2ab}}$

• 3]

  $\frac{{{a^2} + {b^2}}}{{2ab}}$

• 4]

  $\frac{{{a^2} - {b^2}}}{{ab}}$

200 ÷ 25 × 4 + 12 - 3 = ?

• 1] 35
• 2] 40
• 3] 30
• 4] 41
• 5] 50

Simplify : $\frac{{ - \frac{1}{2} - \frac{2}{3} + \frac{4}{5} - \frac{1}{3} + \frac{1}{5} + \frac{3}{4}}}{{\frac{1}{2} + \frac{2}{3} - \frac{4}{3} + \frac{1}{3} - \frac{1}{5} - \frac{4}{5}}}$

• 1]

  -3/10

• 2]

  -10/3

• 3]

  -2

• 4]

  1