A brick measures 25 cm long, 10 cm wide and 7.5 cm thick. How many such bricks will be required to make a wall 5 m long, 2.5 m high and 37.5 cm thick?

The speed of a bus is 60 km/h. how much distance will it travel in 2 h 20 min?

Write the supplementary of the following angles

(a) 20º

(b) 40º

(c) 77º

(d) 89º

Atul lended ₹ 4000 for 3 yr at the rate of 14% per year. Monu lended ₹ 3500 for 2  yr at the rate of 18% per year. Who will get more interest?

Find the area of the following figure

(a) Divided 2.372 by 100.

(b) Add 0.7, 0.07, 0.007 and 25.

9 men or 12 women can do a job in one day. How many women should be there with 6 men to complete the same job in the same time?

(a) Write    as decimal fraction.

(b) Express 7.5% as a fraction with lowest from.

Fill in the blanks

(a) 3, 4, 6, 9, 13, ……..

(b) 5 – 6 × 6 + …. = 4 × 4 × 4

(a) Find the value of x – 2y +  + 1, when x = 2, y = 1

(b) What per cent of 80 is 60?

The maximum marks in an examination are 450. A student gets of 60% of this. How many marks does he get?

Simplify 0.77 ÷ 7 – 0.005 ÷ 5

A packet full of tea is 3 dm in length, 10 cm in width and 4 cm in height. Find the volume of the packet.

What should be subtracted from 21.924 + 9.005 + 17.683 to get 15?

If 9.305 × 25 = 232.625. Find the value of 0.09305 × 0.25.

Write true of false for each of the following statements

(a) Cost price = selling price – loss

(b) The average of three numbers is always one of the three numbers.

(c) An angle whose measure is greater than 90º is an obtuse angle.

(d) Of all the chords of a circle, diameter is the longest.

The average of 7 numbers is 60. Three of these numbers are 50, 35 and 47. Find the average of the other four numbers.

A man borrowed ₹ 900 at a rate of 5% per annum. At the end of 3 yr, he paid back an amount of ₹ 500 and gave his watch for the balance amount. Find the cost of the watch.

Hari bought 3 dozen copies for ₹ 180. How many copies can he buy for ₹ 55?

A number is reduced by 5 and then multiplied by 3. The result is 111. Find the number.

Two sides of a triangle are equal. The angle opposite to third side is 70º. Find the measure of other two angles.

A boy runs a distance of 3 m in one second. What  is his speed in km/h? 

Draw a triangle ABC, in which AB = AC = 4 cm and  BC = 3 cm. What type of triangle is it? 

Find the square of  .

Find the angles of a triangle which are in the ratio  of 1 : 2 : 3.