O P Malhotra, S K Gupta and, Anubhuti Gangal Solutions for Chapter: Integers, Exercise 5: Exercise

Find the value of a to make the expression true.
$\frac{-81}{\mathrm{a}-2}=-9$

Simplify the expression.
$\left(-3\times 6\mathrm{}+2\right)÷(-8)$

Simplify the expression.
$-\mathrm{}5\mathrm{}\left[6÷3\times \left(-2\right)\right]-[9-\left(-5\right)\times 2]$

The temperature in an evening on a day decreased from $17°\mathrm{C}$ at $4:00 \mathrm{p}.\mathrm{m}.$ to $-7°\mathrm{C}$ at $10:00 \mathrm{p}.\mathrm{m}.$ Find the number of degrees, the temperature decreased each hour if the same amount decreased each hour?

Apoorva’s score in a video game was changed by $-105$ points because she missed some targets. If she got $-15$ points for each missed target, how many targets did she miss?

In $15$ years, the length of an island has changed by $-255\mathrm{}\mathrm{c}\mathrm{m}$. If the change in length is the same every year, what is the rate of change in the length per year?

Tick $\left(\mathrm{}\right)$ the correct option.
The value of $6÷(-1)$ does not lie between

Tick $\left(\mathrm{}\right)$ the correct option.
Which of the following is incorrect?