NCERT Solutions for Chapter: Integers, Exercise 1: Exercise

The figure shows the position of the satellite above earth. PR is the line joining the satellite and the centre of earth. P is the position of the satellite, Q is a point on the surface of earth and R is the centre of earth.

The distance between P and Q is $1300 \mathrm{km}$ and the distance between the centre of earth and the satellite is $7671 \mathrm{km}$.

Shobhit marks Q as zero and the direction from Q to P is positive. What is the distance of R with reference to P?

The picture below shows the control panel of a lift in a mall.

‘$0$’ is the ground loor. The two-wheeler parking area ‘$-1$’ is at basement level $1$ and the car parking area ‘$-2$’ is at basement level $2$.

Ahmed enters the lift at Floor $3$ and exits at the two-wheeler parking area. How many loors did the lift go down?

The picture below shows the control panel of a lift in a mall.

‘$0$’ is the ground floor. The two-wheeler parking area ‘$-1$’ is at basement level $1$ and the car parking area ‘$-2$’ is at basement level $2$.

Meera entered the lift at the car parking floor. She pressed ‘$6$’ on the control panel of the lift. How many floors up does she want to go?

Which of the following statements is true?

Which of the following is true?

$A:-12+\left(-15\right) B:-16-\left(12\right) C:-14-\left(-12\right)$

The cost of a pen is the largest two-digit number (in $₹$). The cost of a textbook and geometry box respectively are the successor and predecessor of the cost of the pen. Find the sum of the costs of the textbook and geometry box (in $₹$).

If $x=(-23)+22+(-23)+22 ....$ ($40$ terms) and $y=11+(-10)+11+(-10)+ .....$ ($40$ terms), then $y-x$ is _____.

$P$ is an integer in meters representing "$17 \mathrm{m}$ below sea level". $Q$ is an integer in $₹$ representing "withdrawal of $₹27$". $R$ is an integer in $₹$" representing a gain of $₹43$". Find the following.

$\left|\mathrm{P}\right|+\left|\mathrm{Q}\right|$