Question 3 :
The value of$\displaystyle \left ( 1+\frac{1}{a} \right )\left ( 1+\frac{1}{a-1} \right )\left ( 1+\frac{1}{a-2} \right )\left ( 1+\frac{1}{a-3} \right )\left ( 1+\frac{1}{a-4} \right )$ is

Question 5 :
If the cost of ten tea packet of the same size is $Rs\ 250$, then the cost of $25$ tea packets is

Question 8 :
Frame the statement into an equation:Adding $16$ to $3$ times $x $ is $39$.

Question 10 :
The linear equation $ \left (2x+ 5y = 7 \right )$has<br>

Question 11 :
Say true or false:The root of &#160;the equation $3 - \dfrac{11}{2}x+5x=0$ is $2$.<br/>

Question 12 :
If $x+\dfrac{1}{x}=a+b$ and $ x-\dfrac{1}{x}=a-b $ then, which of the following is correct?

Question 15 :
Mohit baked 2000 cookies. He sold 600 of them and gave the rest equally to20 of his friends. How many cookies did each of his friends receive ?

Question 18 :
In countries like USA and Canada temperature is measured in Fahrenheit where as in countries like India, it is measured in Celsius. Here is a liner equation that converts Fahrenheit to Celsius $F = \left( \dfrac{9}{5} \right ) C + 32$<br/>If the temperature is $0^0$C, what is the temperature in Fahrenheit and if the temperature is $0^0$F, what is the temperature in Celsius