Add
(i) (–40) and (30)
(ii) 60 and (–50)

A submarine is at 32 feet below the sea level. Then it moves up 8 feet. Find the depth of the submarine.

From the ground floor a man went up six floors and came down six floors. In which floor is he now?

Find the missing integers 
(i) 0 + (2345) =______
(ii) 23479 +  ______= 0

Find the value of :
(i) (-35)\(\times \) (-11) 
(ii) 96\(\times \)(-20) 
(iii) (-5)\(\times \)12 
(iv) 15\(\times \) 5 
(v) 999\(\times \)0

Browsing rates in an internet centre is Rs. 15 per hour. Nila works on the internet for 2 hours in a day for 5 days in a week. How much does she pay?

Prove that (–7) x (+8) is an integer and mention the property.

Are (–42) x (–7) and (–7) x (–42) equal? Mention the property.

Are (–81) x  [5 x (–2)] and [(–81) x  5] x (–2) equal? Mention the property.

Ferozkhan collects Rs.1150 at the rate of  Rs.25 per head from his classmates on account of the 'Flag Day' in his school and returns Rs.8 to each one of them, as instructed by his teacher. Find the amount handed over by him to his teacher.

How many years are between 323 BC(BCE) and 1687 AD(CE)?

One of the sides and the corresponding height of the parallelogram are 12 m and 8 m respectively. Find the area of the parallelogram.

A parallelogram has adjacent sides 12 cm and 9 cm. If the distance between its shorter sides is 8 cm, find the distance between its longer side

Find the area of the trapezium whose height is 14 cm and the parallel sides are 18 cm and 9 cm of length

The area of a trapezium is 828 sq. cm. If the lengths of its parallel sides are 19.6 cm and 16.4 cm, find the distance between them.

The collar of a shirt is in the form of isosceles trapezium whose parallel sides are 17 cm and 14 cm and the distance between them is 4 cm. Find the area of canvas that will be used to stitch the collar.

Find the numerical co-efficient of the following terms. Also, find the co efficient of x and y in each of the term: 3x, - 5xy, - yz, 7xyz, y, 16yx.

Find the value of
(i) 3m + 2n
(ii) 2m − n
(iii) mn − 1, given that m = 2, n = − 1.

A person has Rs.960 in denominations of Rs.1, Rs.5 and Rs.10 notes. The number of notes in each denomination is equal. What is the total number of notes?

A school bus starts with full strength of 60 students. It drops some students at the first bus stop. At the second bus stop, twice the number of students get down from the bus. 6 students get down at the third bus stop and the number of students remaining in the bus is only 3. How many students got down at the first stop?

In Fig., find \(\angle \)AOC.

Which of the following pair of adjacent angles will make a linear pair?
(i) 89°, 91°
(ii) 105°, 65°
(iii) 117°, 62°
(iv) 40°, 140°

Two angles are in the ratio 3:2. If they are linear pair, find them.

Find the tetromino shapes found in the showcase given in Fig below. Form the same shape in the geoboard using rubberbands

Madhan has to go to Karur from Coimbatore for an official visit. On his onward journey, he goes via Vellakoil to reach Karur. While returning to Coimbatore he travels via Erode. Both the routes travelled by him are given in the Fig Find the shortest route?