1.6 million students will sit for the CBSE exams 2010

Over 1.6 million students will sit for the Central Board of Secondary Education (CBSE) examinations starting March 3 at over 5,500 centres spread across the country and abroad, an official release said here Friday.

This year 902,517 students of Class 10 and 699,129 of Class 12 will take the board exams, a CBSE release said.

Last year, 824,438 candidates appeared for the Class 10 examinations while 637,578 students took the Class 12 exams.

Of the total number of Class 10 students, 368,802 are female candidates while 533,715 are male students. Similarly in the Class 12 exams, there are 290,762 female candidates and 408,367 male students.

Among the candidates in special categories, 1,891 of Cla

Question 1) Evaluate without using trignometric table: cos 75^o/sin 15^o + sin 12^o/cos 78^o - cos 18^o/sin 72^o (Marks 2)

Question 3) If tan A = b/a where a and b are real numbers, find the value of sin2 A (Marks 2)

Question 4) A cricketer has mean score of 58 runs in nine innings. Find out how many runs are to be scored in the tenth innings to raise the mean score to 61. (Marks 2)

Question 5) Find the mean of the following data: 46, 64, 87, 41, 58, 77, 35, 90, 55, 33, 92 If in the data, the observation 92 is replaced by 19, determine the new median. (Marks 2) click for answer

Question 6) Harshad purchased a motorcycle for Rs. 42,952 which includes the amount of sales tax. If the tax charged is 12% of the list price, find the list price of the motorcycle. (Marks 2)

Question 7) The circumference of the edge of a hemispherical bowl is 132 cm. Find the capacity of the bowl ( Π= 22/7) (Marks 2)

Question 8) Find the value of c for which the quadratic equation 4x2 - 2(c + 1)x + (c + 4) = 0 has equal roots. (Marks 2)

Question 9) The ages of two girls are in the ratio 5 : 7. Eight years ago their ages were in the ratio 7 : 13. Find their present ages. (Marks 2)

Question 10) Find the value of k for which the system of equation 8x + 5y = 9, kx + 10y = 15 has no solution. (Marks 2)

Question 11) Find the G.C.D. of 24(4x² - 9) and 18(2x² + 5x - 12) (Marks 2)

Question 12) Flow chart. Deleted from the syllabus. (Marks 2)

Question 13) In figure ABCD is a cyclic quadrilateral. AE is drawn parallel to CD and BA is produced. If ABC = 92o, FAE = 20o, find BCD. (Marks 2)
No answer

Question 14) Determine the length of an altitude of an equilateral triangle of side 2a cm. (Marks 2)

Question 15) In the figure, a circle touches all the four sides of a quadrilateral ABCD where sides AB = 6 cm, BC = 7 cm and CD = 4 cm. Find AD. (Marks 2)
sorry, no answer for this as I do not have diagram for this question>

Answer1)
cos 75^o/sin 15^o + sin 12^o/cos 78^o - cos 18^o/sin 72^o
= cos (90-15)^o/sin 15^o + sin (90-78)^o/cos 78^o - cos (90-72)^o/sin 72^o
= sin 15^o/sin 15^o + cos 78^o/cos 78^o - sin 72^o/sin 72^o
= 1 + 1 - 1
= 1 (ANS)

Answer2)
tan A = b/a
==> tan²A = b²/a²
==> sin²A/cos²A = b²/a²
==> sin²A/1 - sin²A = b²/a²
==> a²sin²A = b² - b²sin²A
==> a²sin²A + b²sin²A = b²
==> sin²A (a² + b²) = b²
==> sin²A = b²/(a² + b²)

Answer 5)

Section - A

Question1) For what value of k will the following system of linear equations have an infinite number of solutions : 2x + 3y = 2; (k + 2)x + (2k + 1)y = 2(k - 1) ? (Marks 2)

Question 2) Find whether the number 6, 10, 14 and 22 are in proportional or not. If not what number be added to each number so that they become proportional ? (Marks 2)

CBSE Class 8: Solved Multiple Choice Questions Science (Political Science Secularism)

1. British come to India as :-
a. Social reformer
b. Inventor
c. As a ruler
d. As a traders
Ans : (d)

2. How many languages are accepted in Indian constitution?
a. 22
b. 28
c. 15
d. 20
Ans : (a)

3. Bi-Hinduism started in the year
a. 1870
b. 1878
c. 1865
d. 1861
Ans : (b)

 CBSE Class 8: Solved Multiple Choice Questions Science (Understanding Marginalisation)

1. Marginalisation means :-
a. At the centre of thing
b. Forced to occupy the side
c. Both (a) & (b)
d. None of these
Ans : (b)

2. In social environment, Marginalisation is due to :-
a. Different Language
b. Different Religion
c. Minority
d. All of these
Ans : (d)

 CBSE Class 8: Solved Multiple Choice Questions Science (Why do we need Parliament)

1. The president of India holds office for a period of:-
a. 6
b. 5
c. 4
d. 7
Ans : (b)

2. President electoral college consists of:-
a. M.P
b. M.L.A.
c. Members of state legislative
d. Elected members of parliament & state legislative
Ans : (d)

3. A dispute regarding the election of the president is referred to the:-
a. Election commission

CBSE Class 8: Solved Multiple Choice Questions Science (Public Facilities)

1. British come to India as :-
a. Social reformer
b. Inventor
c. As a ruler
d. As a traders
Ans : (d)

2. How many languages are accepted in Indian constitution?
a. 22
b. 28
c. 15
d. 20
Ans : (a)

3. Bi-Hinduism started in the year
a. 1870
b. 1878
c. 1865
d. 1861
Ans : (b)

CBSE Class 8: Solved Multiple Choice Questions Science (metals and nonmetals)

1. The property of metals by which they can be beaten in to thin sheets is called-
a. malleability
b. Ductility
c. conduction
d. Expansion
Ans . 1. (a)

2. Which one of the following is metal?
a. C
b. N
c. Na
d. O
Ans . 2. (c)

3. Which one of the following is non metal?
a. Zn
b. Al
c. Fe
d. N
Ans . 3. (d)

CBSE Class 8: Solved Multiple Choice Questions Science (Law and Social Justice)

1. All persons are equal before _____
a. Police
b. Minister
c. Law
d. Court
Ans : (a)

2. To enforce the rule we have :-
a. Courts
b. Judiciary
c. Minister
d. Police
Ans : (b)

3. 'Right to health' is included in :-
a. Act 21
b. Act 42
c. Act 356
d. Act 29
Ans : (a)

4. 26 January was a day to establish :-

CBSE Class 8: Solved Multiple Choice Questions Science (Judiciary)

1. Law apply equally to all ___
a. Animals
b. Ministers
c. M.L.A's
d. Persons
Ans : (a)

2. We have judicial system to :-
a. To provide freedom
b. To provide food
c. To enforce the rule law
d. None of these
Ans : (c)

3. Judiciary system provide mechanism for resolving disputes between ______
a. Citizens
b. Citizens & government

 CBSE Class 8: Solved Multiple Choice Questions Science (Understanding Our Criminal Justice System)

1. When someone violate the law, we immediately inform :-
a. Neighbours
b. Relative
c. Judge
d. Police
Ans: (d)

2. Police generally do :-
a. File report
b. Arrest a person
c. Both (a) & (b)
d. None of these
Ans: (c)

CBSE Class 8: Solved Multiple Choice Questions Science (combustion and flame)

1. Which fuels are used for running automobiles?
a. Wood
b. Coal
c. Diesel
d. Charcoal
Ans. 1. (c)

2. When magnesium ribbon burnt it produce
a. Magnesium hydroxide
b. Magnesium oxide
c. Magnesium chloride
d. Magnesium sulphate
Ans.2. (b)

3. Charcoal burns in air producing-
a. CO2
b. CO
c. H2
d.O2
Ans.3. (a)