Question 4 :
In an electric circuit, two resistors with resistances xand y are connected in parallel. In this case, if r is thecombined resistance of these two resistors, then thereciprocal of r is equal to the sum of the reciprocalsof x and y. What is r in terms of x and y ?
Question 5 :
The sum of $\displaystyle \frac {8}{15}$ and $\displaystyle \frac {7}{15}$ is ..........
Question 6 :
The smallest fraction which should be subtracted from the sum of $1\dfrac{3}{4},\,2 \dfrac{1}{2},\,5 \dfrac{7}{12}, \,3\dfrac{1}{3}$ and $2 \dfrac{1}{4}$ to make the result a whole number, is _______.
Question 8 :
If$\displaystyle \frac { 1 }{ x } -\frac { 1 }{ x+1 } =\frac { 1 }{ x+4 }$, then x could be
Question 9 :
$\dfrac{1}{1 + x^{a-b}} + \dfrac{1}{1 + x^{b-a}} $ is equal to<br/>
Question 12 :
There are four people in a room. If they cut an apple into $4$ equal pieces and take $1$ piece each, each has eaten what part of the apple?
Question 13 :
$\displaystyle \frac { 0.99999999 }{ 1.0001 } -\frac { 0.99999991 }{ 1.0003 } =$
Question 20 :
Which of the following solid object has both vertical and horizontal cross-sections same?
Question 21 :
Using Euler's formula, find $V$, if $E = 30, F = 12$
Question 24 :
If each side of an equilateral triangle is doubled then its angle will ______
Question 25 :
The angles of a triangle are in the ratio of $3:5:7.$ What is the measure of the largest interior angle of the triangle?<br/>