A submarine at the depth of $45 \mathrm{m}$ rises to $20 \mathrm{m}$ below sea level.

What is the depth of the submarine after rising?

A diver at the depth of $60 \mathrm{m}$ spotted a seaweed $23 \mathrm{m}$ below him.

What is the depth of the seaweed from the sea level?

$8–8=0$ Which of the following is true for the numbers shown above?

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 $7671 \mathrm{km}$.

What is the distance between the points Q and R?

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?

A person hired a cab and paid $₹200$ as advance, at the beginning of the journey. But the fare was $₹240$ when the journey was ended. The cab company adjusted the balance amount in his person's account accordingly.

Next day, the person hired another cab from the same company and fare was $₹180$. How much money should the company charge from the person this time to maintain a zero balance in the person's account?

The sum of the greatest three-digit positive integer and the greatest two-digit negative integer is?