8th Maths Practice Paper-1

1. An altitude of a triangle is 5/3 of its corresponding base. If the altitude were increased by 4 cm and the base decreased by 2 cm, the area of the triangle would remain the same.Find the base and altitude of the triangle.

2. Some toffees are bought at the rate of 11 for Rs. 10 and same numbers are bought at the rate of 9 for Rs 10. If the whole lot is sold at one rupee per toffee, find the gain or loss percent.

3. Chandu purchased a watch at 20% discount on its marked price but sold it at marked price. Find the gain percent of Chandu on this transaction.

4. A motorboat covers a certain distance downstream in a river in five hours. It covers the same distance upstream in five hours and half. The speed of water is 1.5 km/hr. Find the speed of the boat in still water.

5. Factorize: x6 – 3x4y2 +3x2y4 –y6

6. Evaluate: (367/2 –369/2)/ 365/2

7. Divide 34x-22x3-12x4-10x2-75 by (3x+7) and check your answer.

8. The digit in the tens place of a number is three times that in the ones place. If the digits  are reversed, the new number will be 36 less than the original number. Find the number.

9. A well is dug 20m deep and it has a diameter 7m. The earth, which is so dug out, is spread out on a rectangular plot 22m long and 14m broad. What is the height of the platform so formed?

10. The total surface area of a hollow cylinder open at both ends is 4620 sqcm, area of the base ring is 115.5sqcm and height 7cm. find the thickness of the cylinder.

11. A hemispherical bowl is made of steel 0.5cm thick. The inside radius of the bowl is 4cm. Find the volume of steel used in making the bowl.

12. A circus tent is cylindrical up to a height of 3m and conical above it .If the radius of the base is 49m and the slant height of the conical part is 53m, find the total canvas required to make the tent.

13. A storage tank consists of a circular cylinder with hemispherical ends on both the sides. If  the external diameter of the cylinder be 1.4m and length be 5m. What will be the cost of painting it on the outside at the rate of Rs10 per sq. cm?

14. The difference between the compound interest and simple interest on a certain sum of money for two years at 7.5% per annum is Rs 360. Find the sum.

15. At what rate % per annum will a sum of Rs 4000 yield compound interest of Rs 410 in two years?

16. Diagonal of a parallelogram bisect at the point O . XY is a line segment passing through O such that X lies on AD and Y lies on BC. Give reasons for each of the following
(i) OB=OD ((ii)DBOYcongruent DDOX.

8th Maths Practice Paper-1 Download  full Question paper pdf

8th Direct and Inverse Variation and Profit, Loss ... - cbse math study

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These were sold at 8%gain and 4% loss respectively. Find his gain orloss percent in the whole transaction. Q-11. Some toffees are bought at the rate of11 per Rs.10 and sold at the rate of 9 per Rs.10. If the whole lot is sold at one rupee per toffee, find his gain or loss percent on the whole transaction.

CBSE Sample Papers Class 8th Maths

CBSE ADDA: CBSE Sample Papers Class 8th Maths: CBSE Sample Papers Class 8th Maths,VIII Maths Solved Questions VIII_science_ sample paper term-II Download File VIII_maths_sample_paper
Rational Number
Recall, Properties of Addition of Rational Numbers, Properties of Subtraction of Rational Numbers, Properties of Multiplication of Rational Numbers, Properties of Division of Rational Numbers, Representation of Rational Numbers on the Number Line, Rational Numbers between two Rational Numbers.

Linear Equations in One Variable
Recall, Solving Linear Equations, Application of Linear Equations.

Understanding Quadrilaterals
Polygons, Sum of the measures of interior and exterior angles of Polygon, Quadrilaterals : Parallelograms and Kites, Rectangles, Squares and Rhombi, Trapezoids.
Practical Geometry
Construction of a quadrilateral when four sides and one diagonal are given, Construction of a quadrilateral when three sides and two diagonals are given, Construction of a quadrilateral when three angles and two included sides are given, Construction of a quadrilateral when three sides and their included angles are given, Construction of a quadrilateral when its four sides and one angle are given.

Data Handling
Tabulation of data, Grouping of data, Histograms, Circle Graph/Pie Chart, Chance and Probability.

Square and Square Roots
Introduction, Properties of Square Numbers, Patterns of Square Numbers, Finding Square of a Number, Finding Square Roots.
Cubes and Cubes Roots
Introduction, Cube Roots.

Comparing Quantities
(A) Percentage (B) Profit and Loss
(C) Discount and Sales Tax (D) Compound Interest
Percentage, Profit and Loss, Discount and Sales Tax, Compound Interest.

Algebraic Expressions and Identities
Addition and Subtraction of Algebraic Expressions, Product of a Monomial and a Polynomial, Product of Two Polynomials, Standard Identities,Visualizing Solid ShapesVisualizing Shapes, Faces, Vertices and Edges, and Polyhedrons.

Mensuration
Area of Special Quadrilateral, Area of a Polygon, Surface area and Volume of a Cuboid and a Cube, Surface area and Volume of a Right Circular Cylinder.

Exponents and Powers
Negative integral Exponents, Laws of integral Exponents, Expressing Numbers in the Standard Form, Converting Numbers from Standard Form to Usual Form.

Direct and Inverse Proportions
Direct Proportion, Inverse Proportion.

Factorization
Factorization by Grouping, Factorization of Trinomials of the type X^2+bx+c, Factorization of Trinomials of the type ax^2+bx+c, Factorization using Identities, Division of Algebraic Expressions.
Introduction of Graphs
Types of Graphs, Linear Graphs.
Playing with Numbers
Playing with Numbers, Games with Numbers, Tests of divisibility.

JSUNIL TUTORIAL,SUNDAY MATHS TEST FOR CLASS 8 AND 9 QUESTION PAPERS

Class 9th Mathematics January test 2012 Time: 1 Hr. FM: 35

1. Two parallelograms are on equal bases and between the same parallels. The ratio of their areas is—

2. A cuboids having surface areas of 3 adjacent faces as a, b and c has the volume -----

3. Each edge of a cube is increased by 40%. The % increase in the surface area is----

4. In a class, there are x girls and y boys, a student is selected randomly, then probability of selecting boy is -------

5. The probability of an event is always ---------- to 1
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1. Fill in the blanks carrying 1 marks

1) If the edges of a cube are halved, then its volume become

2) For plotting a point on graph sheet, we need ______ and ______.

3) ---- is the co-ordinates of origin.

4) The point (0, 5) lie on--------- axis

5) The representation of statistical data by means of circle is known as ------- that is also called a----

6) A coin is tossed twice. --------- is the probability of getting both tails.

7) One card is drawn from a well shuffled deck of 52 cards. --- is the probability of getting a face card.

8) ------ is the maximum value of the probability for an event?

9) Two dice are thrown simultaneously. –- is the probability of getting an even number as the sum.

10) If base radius of a cylinder is doubled then the volume of new cylinder  ______ times the volume of given cylinder.
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CBSE VIII Maths Time and work

1. A can do piece of work in 30 days while B alone can do it in 40 days. In how many days can A and B working together do it? Ans 17 1/7
2. A and B together can complete a piece of work in 35 days while A alone can complete the same work in 60 days. B alone will be able to complete the same working in ans 84 days
3. A can do a piece of work in 7days of 9 horse each and B can do it in 6 days of 7 hours each. How long will they take to do it, working together 8 2/5 hours a day ? ans 3 days
4. A can do a piece of work in 15 days and B alone can do it in 10 days. B works at it for 5 days and them leaves. A alone can finish the remaining in ans : 7 1/ 2 days
5. A can do 1/3 of the work in 5 days and B can do 2/5 of the work in 10 days in how many days both A and B together can do the wrok ans 9 3/8
6. A can do a piece of work in 80 days. He works at it for 10 days and then B alone finished the remaining work in 42 days. The two together could complete the work in : ans 30 days
7. A and B can together finish a work in 30 days. They worked at it for 20 days and then B left. The remaining work was done by A alone in 20 more days A alone can finish the work in ans : 60 days
8. A and B can do a piece of work in 45 days and 40 days respectively. They began to go the work together but A leaves after some days and than B completed the reaminnig work in 23 days. The number o days after which A left the work was ans: 9
9. A does half as much work as B in three fourth of the time. If together they take 18 days to complete the work, how much time shall B take to do it ?ans 30 days
10. A can do a certain job in 12 days. B is 60% more efficient than A . The number of days, it takes B to do the same piece of work is ans 7 ½
11. A can do a certain job in 25 days which B alone can do in 20 days. A stared the work and was joined by B after 10 days. The number days taken in completing the work was ans 16 2/3
12. A is twice as good a work man as B and together they finish a piece of work in 14 days The number of days taken by A alone to finish the work. Ans: 21 days
13. A is thrice as good a workman as B and takes 10 days less to do a piece of work than B takes.B alone can do the while work work in : ans 15 days
14. A can do a piece work in 14 days which B can do in 21 days. They being together but 3 days the completion of the work. A leaves of the total number of days to complete the work is ans 10 1/5
15. If Ramesh, suresh and harish can do a piece of work in 15 days, 10 days and 6 days resp. How long will they take to do it, if all the three work it together. ? ans 3 days
16. A and B can do a piece of working 72 days : B and C and do it in 120 days ; A and C can do it in 90 days. In what time can A alone do it ? ans 120 days
17. A and B and C together can finish a piece of work in 4 days: alone can do it in 12 days and B in 18 days, then C alone can do it in : ans 9 days
18. If A and B C together can finish a piece of work in 4 days”: 
19. A and B can do a piece of work in 18 days: B and C can do it in 24 days : A and C can do it in 36 days. In
20. If A and B C together can finish a piece of work in 18 days” B and C can do it in 24 days: A and C do it in 36 days after A has been working it for 5 days for days C finished in 13 days. In how many days C alone will do the work ans : 24
21. A is twice as good as workman as B and together they complete a work in 15 days . in how many days can the work be complete by B alone ans 45
22. 45 men can complete a wok in 16 days. Six days after they started working 30 more men joined them. How many days will they now take to complete the remaining work? Ans 6
23. 12 men can complete a work in 18 days six days after they started working men joined them. How many days will all of them together complete the remaining work? Ans 9
24. Twelve men can complete a work in 8 days. Three days after started the work 3 more men joined. In how many days will all of them together complete the remaining work ans 4
25. A,B and C are employed to do a piece of work for Rs.529. A and C are supposed to finish 19/23 of the work together. How much shall be paid to B? Ans 9

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VIII MATHS ASSIGNMENT SA-2 unit Exponents and Radicals, Polynomials, Compound Interest