Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions for Mathematics

Explain how this figure is a trapezium. Which of its two sides are parallel?

Find m∠C in the following figure if `bar(AB) || bar(DC)`

All parallelograms are trapeziums.

All squares are trapeziums.

For which of these would you use a histogram to show the data?

(a) The number of letters for different areas in a postman’s bag.

(b) The height of competitors in an athletics meet.

(c) The number of cassettes produced by 5 companies.

(d) The number of passengers boarding trains from 7:00 a.m. to 7:00 p.m. at a station.

Give reasons for each.

The shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G). The following list gives the shoppers who came during the first hour in the morning

W W W G B W W M G G M M W W W W G B M W B G G M W W M M W W W M W B W G M W W W W G W M M W W M W G W M G W M M B G G W

Make a frequency distribution table using tally marks. Draw a bar graph to illustrate it.

The weekly wages (in Rs) of 30 workers in a factory are.

830, 835, 890, 810, 835, 836, 869, 845, 898, 890, 820, 860, 832, 833, 855, 845, 804, 808, 812, 840, 885, 835, 835, 836, 878, 840, 868, 890, 806, 840

Using tally marks make a frequency table with intervals as 800 − 810, 810 − 820 and so on.

Draw a histogram for the frequency table made for the data in Question 3 and answer the following questions.

(1) Which group has the maximum number of workers?

(2) How many workers earn Rs 850 and more?

(3) How many workers earn less than Rs 850?

The number of hours for which students of a particular class watched television during holidays is shown through the given graph.

Answer the following

1) For how many hours did the maximum number of students watch TV?

2) How many students watched TV for less than 4 hours?

3) How many students spent more than 5 hours in watching TV?

Find the square root of the following decimal number.

2.56

Find the square root of the following decimal number.

7.29

Find the square root of the following decimal number.

51.84

Find the square root of the following decimal number.

42.25

Find the square root of the following decimal number.

31.36

Calculate the amount and compound interest on Rs 10800 for 3 years at `12 1/2` % per annum compounded annually.

Calculate the amount and compound interest on  Rs 18000 for `2 1/2` years at 10% per annum compounded annually.

Calculate the amount and compound interest on Rs 62500 for `1 1/2` years at 8% per annum compounded half yearly.

Calculate the amount and compound interest on Rs 8000 for 1 year at 9% per annum compound half yearly. (You could use the year by year calculation using SI formula to verify)

Calculate the amount and compound interest on Rs 10000 for 1 year at 8% per annum compounded half yearly.

Carry out the multiplication of the expression of the following pair.

4p, q + r