Monday 11 December 2017

REVISION TEST_11.12.2017

MATHEMATICS
1.  Find the distance between A(2,-2) and B(5,6).                              (1)

2.  ABC and BDE are two equilateral triangles such that D is the mid point
of BC. The ratio of the areas of triangles ABC and BDE is
     (a)  2 : 1      (b)  1 : 2        (c)  4 : 1      (d)  1 : 4                             (1)
3.  Find the value of x such that PQ = QR where coordinates of  P, Q and R
are (6 , - 1 ) , ( 1 , 3 ) and ( x , 8 ) respectively.          (2)
4.  In ABC, D and E are the points on the sides AB and AC respectively,
such that  DE II BC.  If AD = 4 , AE = 8 , DB = x – 4 and EC = 3x – 19, find x.
                                                                                                            (2)
5.  Find the ratio in which  the line segment joining the points ( 6 , 4 ) and 
( 1 , - 7 )  is divided by x-axis.                                                             (3)
6.  A vertical stick 10 m. long casts a shadow 8 m. long.  At the same time a
      Tower casts a shadow 30 m. long.  Determine the height of the tower.
                                                                                                            (3)
7.  If the points A (x, y), B (a, 0), C (0, b) are collinear, prove
                                                                                                            (4)
8.  In the adjoining figure, if DE AC and DC AP, prove that
                                    (4)






Revision Test – Class – X
Social Science
Very short questions- 1x4=4
1. What are placer deposits?
2. What are veins and lodes?
3. What are the two planks of sustainable energy?
4. What do you mean by the term collateral?
Short questions-3x2=6
1. What do you understand by ‘Bhoodan’ and ‘Gramdan’?
2. Describe the cropping seasons in India?
Long questions-5x2=10
1. What are the four main type of coal found in India? Explain.
2. Why are poor households still dependent on informal sources of credit? Explain.




ENGLISH
1.       ‘ I hope the part calls for some dialogue?’ who says this? Why does he/she ask this question?(3)
2.       The ice was here, the ice was there,
The ice was all around:
It cracked and growled, and roared and howled,
Like noises in a swound!(1x6= 6)
(a)    What literary device is used in the first two lines? What effect does it create?
(b)   Which word rhymes with ‘ around’?give its meaning.
(c)    Identify the words that create sound effect. What literary device do they exemplify?
(d)   What happened soon after this?
(e)   How is the extent of the spread of ice conveyed?
(f)     What atmosphere do these lines create?
3.       Describe the summer cottage,’fern Quarry’ and its surroundings?(5)
4.        News headlines:-
(a) IIM-I plans to open study centre in uae.
Indore : the Indian institution of management, indore(IIM-I)__________
__________ in partnership with a private company.
(b)INDIA RESUMES ‘ POLITICAL DIPLOMACY’ WITH NEPAL.
Kathmandu ____________ with Nepal after a gap of 15 years with a visit to the northern neighbour by a group of six young parliamentarians.
(c) BANGLADESH SEEKS $1.8 BILLION POST CYCLONE AID
Bangladesh ______ from the international community.
Give suitable news headlines for each news story:
(d) _____________
Srinagar: a moderate  quake measuring 5.7 on the Richter scale hit Jammu and Kashmir at 3.19pm on Monday.
(e)
Jaunpur : twelve passengers were injured when the bus they were travelling in overturned in Newadhiya area on Tuesday
SCIENCE
  1. Rahul has been collecting copper coins and silver coins. One day he observed a green coating on copper coins and a black coating on silver coins. State the chemical phenomenon responsible for these coatings and also write chemical names of each coating. (2)
  2.  Based on the group valency of elements, state the formula for the following giving justification for each:
(i)                  Oxides of 1st group elements,
(ii)                 Halides of the elements of group 13, and
(iii)                Compounds formed when an element of group 2 combines with an element of group 16 .(3)
3.  (a) What is the criteria used in the development of Modern Periodic Table?
     (b) State the position of (i) metals, (ii) non-metals and (iii) metalloids in the     periodic table.
     (c) Would you place two isotopes of chlorine; Cl-35 and Cl-37 in different slots of the periodic table or in the same slot of periodic table? Answer w.r.t part (a). (3)
4. Four elements P, Q, R, S has the atomic no, 12, 13, 14, 15 respectively.
Answer the following questions and give reasons:
(i)                  What is the valency of Q?
(ii)                What is the increasing order of the atomic size?
(iii)               What is the increasing order of the metallic character?
(iv)              Which element is most likely to be a non metal?       (4)
  1. Why sodium is stored in kerosene oil? Give chemical equation(s) to show your answer. (2)
  2. Name any one ore of mercury. How can it be extracted from the ore? Give equations in support of your answer. (3)
  3. Cu metal was immersed in a freshly prepared solution of FeSO4. Explain how the reaction will take place and give reason. (2)
  4. Name one metal and a non metal which is liquid at room temperature.


Saturday 18 November 2017

MATHS ASSIGNMENT_18.11.2017

                                Class X                 Maths Weekly assignment _18.11.2017

1. Prove that root ü5 is an irrational number.
2. Find the zeroes and verify the relationship between the zeroes 3x2 – x – 4
3. Solve 2x + 3y = 11 and 2x – 4y= – 24 and hence find the value of ‘m’ for which y = mx + 3
4. The altitude of a right triangle is 7 cm less than its base . If the hypotenuse is 13 cm, find the other
    two side (Solve question using completing the square method) ]
5. The sum of the 4th and 8th term of an A.P is 24 and the sum of the 6th and 10th term is 44. Find the first  three terms of the AP.
6. State and prove Pythagoras theorem.
7. Find the area of the triangle whose vertices are (– 5, –1) , ( 3 , –5) and ( 5, 2 )
8. Draw a line segment AB of length 10 cm. Taking A as centre draw a  circle of radius 4 cm and taking B as centre , draw another circle of radius 5 cm. Construct tangents to each other from the centre of the other circle.
9. In a circle of radius 21 cm, an arc subtends and an angle of 600 at the center . Find
      i) The length of the arc
     ii) Area of minor and major sector
    iii) Area of the segment formed by corresponding chord.
10. A cylindrical bucket 32 cm high and with radius of base 18 cm is filled with sand. This bucket is
     emptied on the ground and a conical heap of sand is formed . If the height of the conical heap is  
     24 cm . Find the radius and slant height of the heap.

                  ****************************18.11.2017*******************************


ASSIGNENT_18.11.2017

Sunday 27 August 2017

REVISION TEST_24.08.2017

Class X                 Mathematics revision test               M.M-15

Section-A                                 3 x 2 = 6

1. Use Euclid’s division algorithm to find the HCF of 4052 and 12576.
2. In    OPQ right angled at P, OP=7 cm and OQ – PQ = 1 cm,
    Determine the value of Sin Q,  Tan O. 
3. Prove that ü5 is irrational number.
Section-B                                3 x 3 = 9
4. Use Euclid’s division lemma to show that the cube of any positive
     integer is of the form 9m, 9m+1 or 9m+8
5. Prove that Sec4 A – Sec2A = Tan4 A + Tan2 A
6. A straight highway leads to the foot of a tower. A man standing at
    the top of the tower observes a car at an angle of depression of  
   300, which is approaching the foot of the tower with a uniform
   speed. Six second later, the angle of depression of the car is found
   to be 600. Find the time taken by the car to reach the foot of the
   tower from this point.

==================================================== 

Monday 21 August 2017

HOMEWORK_21.08.2017

                  HOMEWORK_21.08.2017

* Exercise 3.3-->  Q3 ( i to vi parts) 
* Exercise 3.4 --> Q2 (ii to  v parts) 

 (Test of statement sums(Form the pair of    linear equations) 

 Regards
 Mr. Devender

Friday 18 August 2017

HOMEWORK_18.08.2017

                         Homework_18.08.2017
1. Find the HCF of 3042 and 14578 by Euclid’s algorithm .
2. Divide the polynomial 4x3-3x2+5x-3 by x2-2
3. The ratio of incomes of two persons is 9:7 and the ratio of
    their expenditures is 4:3 . If each of them manages to save     
    Rs 2000 per month , find their monthly incomes.
4. State and prove Pythagoras theorem .
5. If Sin 3A = Cos ( A – 260) , where 3A is an acute angle, find
     the value of A .

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Monday 31 July 2017

TEST (LINEAR EQUATIONS IN TWO VARIABLE)_01.08.2017

                                     DASS AND BROWN WORLD SCHOOL
Class X                                        Weekly test                                 M.M-10

1. Check whether the following pair of linear equations are consistent or inconsistent ?                                                                                        1 MARK
                          x + 2y  = 3
                        2 x + 3 y = 7
2. The sum of the digits of a two digit number is 13. The number obtained by
     interchanging the digits of the given number exceeds that number by 27.
     Form the pair of linear equations.                            2 MARKS
3. Solve the pairs of linear equations by cross multiplication method.   3 MARKS
          2 x + 5 y – 12=0
          3 x + 7 y = 17
4. A man travels 370 km partly by train and partly by car .If he covers 250 km
    by train and the rest by car, it takes him 4 hours. But, if he travels 130 km by
    train and rest by car, he takes 18 minutes longer . Find the speed of the train
    and that of the car.                                                                               4 MARKS 
                   =============================================== 

Saturday 15 July 2017

TEST OF TRIANGLES_17.07.2017

Do these questions


Q1.DE II BC .Find AE

Q2 .LM II QR , PL/LQ=3/5 and PR=5.6 cm .Find PM 

Q3.CD II LA and DE II AC , .Find CL 


Q4.If the diagonals of a quadrilateral divide each other proportionally , then it is a trapezium. 
Q5.AB II DC , OA=2x+4 , OB = 4x-2 ,OC = x+1 and OD = 4 units .Find the value of x.


Q6.Prove BPT theorem .

Q7.If triangle ABC is similar to triangle DEF .Find x 



Q8. ABCD is a parallelogram prove that (i) DP/PQ=DC/BQ ii) DQ/DP=AQ/DCM



Q9.  Prove that a line drawn through the mid - point of one side of a triangle parallel to another side bisect the third side . 

Q10. Prove that the line joining the mid points of any two sides of a triangle is parallel to the third side.

=========================

Friday 12 May 2017

Assignment_12.05.2017


                                         ASSIGNMENT_12.05.2017


Do the following questions from textbook on assignment notebook
*Do the questions serial wise as mentioned below.

Q1--(Ex 1.1 Q1 ii part)
Q2-- (Ex 1.1 Q 4)
Q3-- ( Ex 1.2 Q3 ii part)
Q4-- (Ex 1.2 Q7)
Q5--( Ex 1.3 Q1)
Q6--( Ex 1.3 Q3 iii part)
Q7--(Ex 2.3 Q3)
Q8-- ( Ex 14.3 Q1)
Q9--( Ex 15.1 Q14)
Q10--(Ex 15.1 Q18)
================      

Monday 8 May 2017

PRACTICE QUESTIONS(STATISTICS)_09.05.2017



Class X                          Practice Question (Statistics)
Q1.Find the mean of the following data ( By direct method) :  Ans-25.2
Class interval
0-10
10-20
20-30
30-40
40-50
Frequency
8
12
10
11
9
Q2. The arithmetic mean of the following frequency distribution is 25. Determine the value of p.  Ans – p=16
Class
0-10
10-20
20-30
30-40
40-50
Frequency
5
18
15
p
6
Q3.If the mean of the following frequency distribution is 65.6 , find the missing frequency f1 and f2 . (Ans – 12,3)
Class
10-30
30-50
50-70
70-90
90-110
110-130
Total
frequency
5
8
F1
20
F2
2
50
Q4.Data regarding the weights of students of class X of a school is given below : (Ans – 57.24 kg)
 Weight ( in kg)
50-52
52-54
54-56
56-58
58-60
60-62
62-64
Number of students
18
21
17
28
16
35
15
Compute the mean weight of the students. ( By assumed mean method)
Q5.Calculate the arithmetic mean of the following frequency distribution using the step –deviation method : (Ans-148.61)
Class interval
Frequency
0-50
17
50-100
35
100-150
43
150-200
40
200-250
21
250-300
24
Q6.Compute the arithmetic mean for the following data . (Ans- 28.6)
Marks obtained
Frequency
Less than 10
14
Less than 20
22
Less than 30
37
Less than 40
58
Less than 50
67
Less than 60
75
Q7.Find the arithmetic mean of the following frequency distribution; (Ans- 36.36)
Class
25-29
30-34
35-39
40-44
45-49
50-54
55-59
Frequency
14
22
16
6
5
3
4
Q8.Find the median wage from the following data:  (Ans- Rs .868)
Wages (In Rs)
800-820
820-840
840-860
860-880
880-900
900-920
920-940
Number of workers
7
14
19
25
20
10
5
Q9.Find the missing frequencies in the following frequency distribution table ,if N=100 and median is 32. (Ans 9,16)
Marks
0-10
10-20
20-30
30-40
40-50
50-60
Total
Number of students
10
?
25
30
?
10
100
Q10.Compare the modal ages of two groups of students appearing for an entrance examination : (Ans-18.93,18.83)
Age ( in years)
16-18
18-20
20-22
22-24
24-26
Group A
50
78
46
28
23
Group B
54
89
40
25
17
Q11.The following table gives production yield per hectare of wheat of 100 farms of a village.
Production yield ( kg/ha)
40-45
45-50
50-55
55-60
60-65
65-70
No of farms
4
6
16
20
30
24
Change the distribution to a ‘more than’ type distribution and drive its ogive.
Q12.The table given below shows the frequency distribution of the scores obtained by 200 candidates in a CET examination. (Ans- 3756)
Score
200-250
250-300
300-350
350-400
400-450
450-500
500-550
550-600
No of candidates
30
15
45
20
25
40
10
15
  Draw cumulative frequency curves by using (i) ‘less than’ series and (ii) ‘More than’ series.   Hence find the median
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REAL NUMBERS - ASSIGNMENT 02