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Padasalai.Net’s Special – Centum Coaching Team Question Paper PART - III MATHEMATICS X std ( ENGLISH VERSION) TIME ALLOWED: 2.30 HRS (2018-2019) MAXIMUM MARKS: 100 INSTRUCTIONS : 1) Check the question paper for fairness of printing. If there is any lack of fairness, inform the hall supervisor immaditely. 2 ) Use Blue or black link to write and pencil to draw diagrams Part-A NOTE : 1) Answer all the 15questions 2) Choose the most suitable answer from the given four alternatives and write the option code and the correspoinding answer. 15 x1=15 1. The x and y-intercepts of the line 2x - 3y + 6 = 0, respectively are a) 2, 3 b) 3, 2 c) -3, 2 d) 3, -2 2. The equation of a straight line having slope 3 and y-intercept 4 is a) 3x - y - 4 = 0 b) 3x + y - 4 = 0c) 3x - y + 4 = 0 d) 3x + y + 4 = 0 3) The GCD of ( x 3 + 1 ) and ( x 4 - 1 ) is .............. a) x 3 - 1 b) x 3 + 1 c) x + 1 c) x 1 4) (1 - sin 2 ) sec 2 = .................. a) 0 b) 1 c) tan 2 d) cos 2 5) A point P is 26 cm away from the centre o of a circle and PT is the tangent drawn from P to the circle is 10cm then OT = ......... a) 36 cm b) 20 cm c) 18 cm d) 24cm 6) The square root of 196 a 6 b 8 c 10 is ........... a) 14 a 3 b 4 c 5 b) 14 a 6 b 8 c 10 c) 10 a 6 b 5 c 5 d) 14 a 3 b 8 c 5 7) If S is the sample space of a random experiment then P(S) = ........ a) 1 b) 2 c) 0 d) -1 8) If f = { (6, 3), (8, 9), (5, 3), (-1, 6) } then the pre-images of 3 are ....... a) 6,-1 b) 1 ,6 c) 6,8 d) 5,8 9) The sides of two similar triangles are in the ratio 2 : 3 then their areas are in the ratio = ......... a) 9 : 4 b) 4 : 9 c) 2 : 3 d) 3 : 2 www.Padasalai.Net www.Padasalai.Net www.TrbTnpsc.com http://www.trbtnpsc.com/2014/10/how-to-get-centum-in-12th-and-10th.html

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  • Padasalai.Net’s Special – Centum Coaching Team Question Paper

    PART - III

    MATHEMATICS

    X std ( ENGLISH VERSION)

    TIME ALLOWED: 2.30 HRS (2018-2019) MAXIMUM MARKS: 100

    INSTRUCTIONS : 1) Check the question paper for fairness of printing. If there is

    any lack of fairness, inform the hall supervisor immaditely.

    2 ) Use Blue or black link to write and pencil to draw diagrams

    Part-A

    NOTE : 1) Answer all the 15questions

    2) Choose the most suitable answer from the given four alternatives

    and write the option code and the correspoinding answer.

    15 x1=15

    1. The x and y-intercepts of the line 2x - 3y + 6 = 0, respectively are

    a) 2, 3 b) 3, 2 c) -3, 2 d) 3, -2

    2. The equation of a straight line having slope 3 and y-intercept – 4 is

    a) 3x - y - 4 = 0 b) 3x + y - 4 = 0c) 3x - y + 4 = 0 d) 3x + y + 4 = 0

    3) The GCD of ( x3 + 1 ) and ( x4 - 1 ) is ..............

    a) x3 - 1 b) x3 + 1 c) x + 1 c) x – 1

    4) (1 - sin 2 ) sec2 = .................. a) 0 b) 1 c) tan2 d) cos 2

    5) A point P is 26 cm away from the centre o of a circle and PT is the tangent drawn from P to the circle is 10cm

    then OT = .........

    a) 36 cm b) 20 cm c) 18 cm d) 24cm

    6) The square root of 196 a6 b8c10 is ...........

    a) 14 a3 b4c5 b) 14 a6 b8c10 c) 10 a6 b5c5 d) 14 a3 b8c5

    7) If S is the sample space of a random experiment then P(S) = ........

    a) 1 b) 2 c) 0 d) -1

    8) If f = { (6, 3), (8, 9), (5, 3), (-1, 6) } then the pre-images of 3 are ....... a) 6,-1 b) 1 ,6 c) 6,8 d) 5,8

    9) The sides of two similar triangles are in the ratio 2 : 3 then their areas are in the ratio = .........

    a) 9 : 4 b) 4 : 9 c) 2 : 3 d) 3 : 2

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  • 10) The greatest value of a collection of data is 72 and the least value is 28 then the coefficient of range a) 44 b) 0.72 c) 0.44 d)0.28

    11) If A x [1 10 2

    ] = [1 2] then the order of A is ...........a) 2x1 b) 1x2 c) 2x2 d) 3x2

    12) If a, b, c are in G.P then 𝑎−𝑏

    𝑏−𝑐 = ...........a) 1 b) a\b c) 0 d) c/d

    13) INTERNATIONAL MATHEMATICAL UNION ………….

    a) NUM b) NMU c) IMU d) MIU

    14) Find the volume of a sphere –shaded metallic shot- put having diameter of 8.4cm

    a) 464.310 b) 301.464 c)310.464 d) 121.464

    15) How many types of variation ……. A) 3 b) 2 c) 4 d) 1

    Part -B

    10 x 2 =20

    NOTE:: (i) Answer 10 questions.

    (ii) Q.no 30 is compulsory .select any 9 question from first 14 question.

    16) Let A = { 1, 2, 3, 4, 5 } B = N and f : A B be defined by f( x ) = x2. Find the range of f. Identify the type of

    function.

    17) If A and B are two sets and U is the Universal set such that n(U) = 700,

    n(A) = 200, n(B) = 300 and n(A∩B) = 100 find n(A′ ∩B′).

    18) Find the first term and common difference 1

    2,

    5

    6,

    7

    6,

    3

    2, ........ ,

    17

    6.

    19) Find the G.C.D of ( 2x2 - x - 1 ), ( 4x2 + 8x + 3 )

    20) Solve for x and y if (2𝑥 + 𝑦

    𝑥 − 3𝑦) = (

    513

    )

    21) Simplify : 𝑥2−4

    𝑎2−1 ×

    𝑎3−𝑎

    𝑥3+2𝑥2.

    22) Find the equation of the straight line passing through the points ( -2, 5 ) and ( 3 , 6 )

    23) Prove that 1+sec 𝜃

    sec 𝜃 =

    𝑠𝑖𝑛 2

    1−cos 𝜃

    24) A die is thrown twice. Find the probability that at least one of the two throws comes up with the number. 5 (use

    addition theorem)

    25) Find the standard deviation of 38, 40, 34, 31, 28, 26, 34

    26)If the csa of solid a sphere hemisphere 277 2sq.cm then find its total surface area.

    27) If [𝑎 31 2

    ] [ 2−1

    ] = [50

    ] then the value of a .

    30) a) In ABC the internal bisector AD of A meets the side BC at D. If

    BD = 2.5cm, AB = 5 cm and AC = 4.2 cm then find DC .

    (or)

    b)Radius and slant height of a cone are 20 cm and 29 cm respectively . Find its volume

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  • Part – c

    Note:: (i) Answer any 9 question 9 x 5 = 45

    (ii) Q.no 45 is compulsory. select any 8 question from first 14 question.

    31) In a town 85% of the people speak Tamil, 40% speak English and 20% speak Hindi. Also, 32% speak English and Tamil,

    13% speak Tamil and Hindi and 10% speak English and Hindi, find the percentage of people who can speak all the three

    languages.

    32) Use Venn diagrams to verify ( A B ) = A B

    33) If the quotient on dividing 2x4 + x3 - 14x 2 - 19 x + 6 by 2x + 1 is ax2 - bx - 6. find the values of a and b also find

    the remainder

    34) If α, β are the roots of the equation 3x2 – 6x + 1 = 0. Then form an equation whose roots are a) 𝛼2𝛽,

    𝛽2𝛼 𝑏)1

    𝛼,

    1

    𝛽 𝑐)2α + β, 2β + α

    35) If a, b, c, d are in G.P then prove that (b-c)2 + (c-a)2 + (d-b)2 = (a-d)2

    36) Solve the equation 1

    𝑥+1 +

    2

    𝑥+2 =

    4

    𝑥+4 where x + 1 0 , x + 2 0 and x + 4 0 using quadratic formula.

    37) Find the equation of the straight line which passes through the point of intersection of the straight lines 5x - 6y = 1

    and 3x + 2y + 5 = 0 and is perpendicular to the straight line 3x - 5y + 11 = 0

    38) The vertices of ΔABC are A(2, 1), B(6, –1) and C(4, 11). Find the equation of the straight line along

    the altitude from the vertex A.

    39) State and prove BPT theorem. 40) If tan + sin = m, tan - sin = n and m n hten show that m2 - n2 = 4√𝑚𝑛 .

    41) A bag contains 10 white, 5 black, 3 green and 2 red balls. One ball is at random. Find the probability that the ball

    drawn is white or black or green.

    42)A solid is in shape of a cylinder surmounted on a hemisphere . If the diameter and the total height of the solid are are 21 cm and

    25.5 cm respectively then find its volume .

    43)If A =−245

    B = (1 3 −6) then verify that (AB)T = BTAT.

    44) Find the SD of the data 3,5,6,7,. Then add 4 to each item and find the SD of new data.

    45)a) A cylindrical shaped well of depth 20 m and diameter 14 m is dug . The dug out soil is evenly spread to form a cuboid platform

    with base dimension 20 m 14 m . Find the height of the platform. (or)

    b) A car left 30 minutes later than the scheduled time. In order to reach its destination 150 km away in time, it has to

    increase its speed by 25 km / hr from its usual speed. Find its usual speed.

    Part – D 2 x 10 = 20

    NOTE :: Anawer both the question choosing either of the alternatives.

    46) a) Construct a cyclic quadrilateral ABCD with AB=7 cm, A = 80, AD = 4.5cm and BC = 5 cm.(or)

    b) Construct a ABC such that AB = 6cm C = 40 and the altitude from C to AB is of length 4.2 cm.

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  • 47) a) Draw graph for the data given in the table. Hence find the number of days taken by 12 workers to complete the work.

    NO OF

    WORKERS

    X

    3

    4 6 8 9 16

    NO OF

    DAYS Y

    96 72 48 36 32 18

    (or) b) Draw the graph of y =(x + 2)(x+4) ******** ALL THE BEST ********

    S. BALAKRISHNAN , M.SC, B.ED , (PG ASST IN MATHS)

    SHRI MARUTHI HIGHER SECONDARY SCHOOL

    V. MADEPALLI –X-ROAD , VEPPANAPALLI

    sKRISHNAGIRI –(DT) -635121

    ANSWER SCRIPTS SEND :

    S. BALAKRISHNAN , M.SC, B.ED , (PG ASST IN MATHS)

    S/0 B. SAMPANGIRAMAN (PWD)

    V. MADEPALLI –X-ROAD , VEPPANAPALLI

    KRISHNAGIRI –(DT) -635121

    CONTACT : MOBILE :: 9159652220 .

    E.MAIL ID:: [email protected]

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  • www.Padasalai.Net www.TrbTnpsc.com

    Padasalai.Net’s Centum Coaching Team

    http://www.trbtnpsc.com/2014/10/how-to-get-centum-in-12th-and-10th.html

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    நாட்களில் முழுலமயான, முலறயான வதர்வு எழுதி வினாத்தாள் தயாாித்து வழங்கிய ஆெிாியருக்கு

    அனுப்பி லவக்க வவண்டும்.

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    If any doubt, Please contact our Padasalai’s Centum Coaching Team Co-ordinator:

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