DASS AND BROWN WORLD SCHOOL 8TH MATHEMATICS : 2018

Saturday, 29 December 2018

WINTER VACATION ASSIGNMENT_29.12.2018

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Friday, 28 December 2018

ANNUAL PRACTICE PAPER

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Monday, 24 December 2018

ASSIGNMENT_24.12.2018

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Class VIII Assignment Date:- 24.12.2018

1. By what number should (-6)^-1 be multiplied so that the product

becomes 9^-1 .

2. Find the square root of 15876

3. Solve

4. Find compound interest and amount compounded annually

P= Rs 10240 , Time= 3 years and R= 12.5% per annum compounded

annually.

5. A and B working together can finish a piece of work in 6 days , while A

alone can do it in 9 days . How much time will B alone take to finish it ?

6. The price of a tea set is increased by 5% . If the increased price is Rs

441 , what is its original price.

7. A man buys lemons at 6 for Rs 10 and sells at 8 for Rs 15. Find his

gain/loss per cent

8. The angles of a quadrilateral are in the ratio 3:5:7:9 . Find the measures

of each of these angles.

Date of submission :- 26.12.2018

Monday, 10 December 2018

SAMPLE PAPER

DASS AND BROWN WORLD SCHOOL

SAMPLE PAPER (2018-19)

Class- VIII Subject :- Mathematics M.M: 20

General Instructions:

1. All the questions are compulsory.

2. Section -A contains questions of one mark each.

3. Section-B contains questions of two marks each.

4. Section-C contains questions of three marks each.

5. Section-D contains questions of four marks each.

Section- A

1. What percent of 5 kg is 200 g ?

2. Find S.P when C.P= Rs 915 , Gain = 6 %

Section- B

3. The value of a machine depreciates 20% every year. If the present value of the machine be

Rs 160000 . What was its value last year ?

4. The marked price of a water cooler is Rs 4650 . The shopkeeper offers an off-season discount

of 18% on it . Find its selling price.

Section- C

5. The value of a car including VAT is Rs 382500. If the basic price of the car be Rs 340000. Find

the rate of VAT on car ?

6. Find the amount and the compound interest when P= Rs 62500 , R= 12% and T= 2 years 6

months compounded annually .

Section- D

7. Mr . Raman purchased a video for Rs 20000 and a television for Rs 30000 . On the video he lost

5% and on the television he gain 8% . Find his total gain or loss percent.

8. The difference between the Compound interest and simple interest on a certain sum for 3

years at 10% per annum is Rs 93. Find the sum .

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Thursday, 22 November 2018

Revise chapter "Profit and loss"

Revise chapter "Profit and loss"

Test of chapter "Profit and loss" on 26.11.2018

Saturday, 17 November 2018

REVISE

Revise Q1 to Q10 of exercise 10A and chapter "Probability" Test on Monday

Monday, 5 November 2018

ASSIGNMENT 05_06.11.2018

DASS AND BROWN WORLD SCHOOL

Class VIII Mathematics 06.11.2018

Assignment no-05

1.Find the amount and the compound interest

on Rs 816000,R=5% p.a,T= 3 years

compounded annually Ans-A=Rs 944622

2. The marked price of a TV is Rs 18500 . A

dealer allow two successive discount of 20%

and 5% . For how much is the TV available ?

Ans- Rs 14060

3.Neeru bought 1600 bananas at Rs 3.75 a

dozen. She sold 900 of them at 2 for Rs 1 and

the remaining at 5 for Rs 2 . Find gain or loss

percent Ans- 46%

4.If the cost price of 6 pencils is equal to the

selling price of 5 pencils, find the gain

percent Ans- 20%

5.Find the amount and the compound interest

on Rs 15625 , R= 8% p.a , t= 1 ½ year

compounded half yearly. Ans- A= Rs 17576

6.The price of a watch is including 10% Vat is Rs 825 . Find its basic price? Ans- Rs 750

7.Manohar purchased two handbags for Rs

1500 each . He sold these bags , gaining 8%

on one and losing 4% on the other . Find his

gain or loss percent in the whole transaction.

Ans- 2%

8.A man sold chairs for Rs 500 each . On one he

gains 20% and on the other he loses 12% .

Calculate the gain or loss percent in the

whole transaction . Ans- 1.5%

*Revise Chapter Profit/ loss & Compound interest

Friday, 26 October 2018

ASSIGNMENT 04_26.10.2018

Assignment no 04

Do the following questions of exercise-->10A ( Q5, Q9, Q16, Q26, Q29 and Q31 )

Date of submission:- 29.10.2018

Thursday, 18 October 2018

ASSIGNMENT 03_18.10.2018

DASS AND BROWN WORLD SCHOOL

Class VIII ASSIGNMENT NO -03 (18.10.2018)

Q1.Convert each of the following ratios into percentage:

(i)14:25 (ii) 5:6

Q2. Express 75 paise as a percentage of Rs 6.

Q3.The price of a shirt is reduced by 12% in a discount sale. If its present price is Rs 1188, find its original price.

Q4.The value of a a machine depreciates 5% every year. If the present value of the machine is Rs 100000 , what will be its value after 2 years?

Q5.The population of a town increases 8% annually. If its present population is 142560, what was it a year ago?

Q6.By selling a rickshaw for Rs 9240, Bansi loses 12%. For how much should he sell it to gain 12%?

Q7.Out of her total monthly salary. Tanvy spends 30% on house rent and 60%

of the rest on household expenditure. If she saves Rs 10500 , what is her

total monthly salary ?

Q8.A’s income is 60% more than that of B . By what percent is B’s income less

than A’s ?

Q9.Amit earns Rs 32000 per month . He spends of his income of food :

of the remainder on house rent and of the remainder on the education

of children. How much is still left with him ?

Q10.Simplify

( 4x²+5x –7) ( x–1)

Date of submission :- 22.10.2018

Saturday, 13 October 2018

ASSIGNMENT 02_13.10.2018

ASSIGNMENT NO 02

Do Q1 to Q6 "CCE TEST PAPER - 9"

Chapter - Percentage

Date of submission - 15.10.2018

Saturday, 6 October 2018

ASSIGNMENT 01_06.10.2018

ASSIGNMENT 01_06.10.2018

Q1. Mr. Narayan saves 20% of his salary .If he receives Rs 14500 per month as his salary , find his monthly expenditure . ( Ans – Rs 11600)

Q2.In an examination , 96% of the candidates passed and 50 failed. How many candidates appeared ? (Ans- 1250)

Q3.The lengths of the diagonals of a rhombus is 16 cm and 12 cm respectively . Find the length of each of its sides.

Q4.The sides of a rectangle are in the ratio 5:4 and its perimeter is 90 cm.Find its length and breadth.

Q5.Write down the number of vertices of each of the following figures

i) Cuboid ii) Square pyramid

Q6.How many faces are there in a

i) Cube ii) Tetrahedron

Date of submission :- 08.10.2018

Friday, 31 August 2018

MATHS HALF SAMPLE PAPER

Download Half yearly maths sample paper from the URL
https://goo.gl/PsFseH

Friday, 24 August 2018

REVISION ASSIGNMENTS _24.08.2018

Download the assignments from the link

https://goo.gl/PsFseH

Open folder REVISION

Saturday, 28 July 2018

Monday, 28 May 2018

OLYMPIADS STUDY MATERIAL

Click on the below link to download Olympiads study material OR Copy the below URL and paste it in address bar .

https://goo.gl/TLeRYL

Saturday, 19 May 2018

REVISION ASSIGNMENTS PA1

Follow the below link to download the assignments

https://drive.google.com/folderview?id=1IWjS82IM6nmg063vnQFVZfi-kY2RYed6

Friday, 11 May 2018

ASSIGNMENT (RATIONAL NUMBERS) _11.05.2018

1) Represent the following rational numbers on the number line:
a)-3/4     b) 31/-6     c) -1/2    d) 3/4
2) Write the following rational numbers in the standard form:
a) 5/15     b) -24/40     c) 33/-77    d) -45/-105

3) Compare the following rational numbers:
1) -9/27, 6/-18     2) -5/7, 10/-6
3) 3/-8, -15/40     4) -11/7, 33/21

4) Arrange the following rational numbers in the descending order:
1) 2/-3, -4/9, -5/12, 7/-18
2) 3/-4, -5/12, -7/16, 9/-24

5) Arrange the following rational numbers in the ascending order:
1) 2/5, 1/3, 3/4, 1/6     2) 5/6, 7/8, 11/12, 3/10

6) Add: 1) 3/7 and -9/7,    2) 5/9 and 7/-9
3) 2/5, 5/-9 and -6/15

7) Verify that a + b = b + a by taking (1) a = -7/5, b = 2/7
(2) a = -1 , b = -2/3

8) Verify that (a+b)+c.=a+(b+c) by taking
(1) a = -2 , b = -2/3 , c = -3/4
(2) a = -12, b = -9/11, c = 7/-12

9) Subtract : i) (-3/4) from (1/2)    ii) (5/8) from (-3/14)

10) What should be added to (-7/20) to get (-2/5)?

11) The sum of two rational numbers is (-3/7). If one of the number is (-5/8) find the other.

12) The sum of two rational numbers is (-5/8). If one of the number is (-6/11), find the other number.

13) To which number should (2/3) be added to give (-11/4)?

14) From which number should (-11/4) be subtracted to give (-11/4)?

15) Find the product of :
1) 5/9, -2/5     2) -5, -3/15

16) Verify the property a x b = b x a by taking :
1) a = (-12/7), b = (-21/5)    2) a = 0 , b = (-13/3)

17) Verify the property a x ( b x c ) = (a x b) x c by taking
i) a = (7/5), b = (-9/4), c = (1/2)     ii) a = 1, b = (-13/5), c = (3/5)

18) Verify the property ax(b+c)=(axb)+(axc) by taking:
1) a = (1/3), b = 0, c = (-7/6)
2) a = -2, b = (9/5), c = (-2/15)

19) The product of two rational numbers is 6. If one of them is 8, find the other number.

20) By what number should (-6/11) be multiplied to get (-32/11)?

21) Find the rational number between:
1) 3 and 4     2) -7 and -6

22) Find three rational numbers between:
1) -5 and 8     2) ( -1/3 ) and (1/2)

23) State whether true or false:
1) Absolute value of a rational number is either positive or 0.
2) There are countless rational numbers with absolute value less than 5.
3) The absolute value of 0 is 0.