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IN SERVICE COURSE 2020 MATHEMATICS PRE TEST ZIET, BBSR

Total questions: 30

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

For journey in LTC , how many days daily allowance shall be admissible?

a)

all days starting from day1 to last day

b)

15 days or the total number of days whichever is minimum

c)

maximum one month

d)

none of these

2.

For how many kilometre the journey on LTC performed by a private/personal transport be regulated, assuming that the place is not connected by any public transport?

a)

maximum 100 kilometres

b)

maximum 50 kilometres

c)

actual journey covered

d)

none of these

3.

For medical reimbursement, advance is paid direct to the hospital and the employee wants to submit the adjustment bills for final settlement . Within how many days the employee can apply in the Vidyalaya?

a)

one month from the date of his discharge

b)

two and half months from the date of his discharge

c)

in the same financial year

d)

none of these

4.

Hard area allowances for the central government employees residing at Nicobar Group of islands is

a)

10% of basics pay

b)

20% of basics pay

c)

16% of basics pay

d)

none of these

5.

The special allowances for child care for women with disabilities is

a)

Rs. 3000 per month

b)

Rs. 2000 per month

c)

Rs. 1000 per month

d)

none of these

6.

The range of  f(x)=xx2x isf\left(x\right)=\frac{\left|x\right|-x}{2x}\ is  

a)

{0 , -1}

b)

(0 , -1)

c)

[0 , -1]

d)

none of these

7.

Solution of  1+ix = 2     is \left|1+i\right|^x\ =\ 2\ \ \ \ \ is\   

a)

x = 2

b)

x = 2 , - 2

c)

no solution exists

d)

x = 0

8.

If 2 + 3 i   is a root of  x2+px+q = 0  then values of p and q arex^2+px+q\ =\ 0\ \ then\ values\ of\ p\ and\ q\ are  

a)

p = - 4 , q = 13

b)

p =  4 , q = 13

c)

p = -4 , q =  - 13

d)

none of these

9.

The sum of the digits in the unit place of all the numbers formed using the digits 3, 4, 5 and 6 taken all at a time is

a)

18

b)

108

c)

81

d)

6

10.

Out of 15 points in a plane, n points are in the same straight line. 445 triangles can be formed by joining these points. the value of n is

a)

15

b)

5

c)

6

d)

none of these

11.

If a, b, c , d and e are in arithmetic progressions, then the value of

a - 4b + 6c - 4d + e is

a)

0

b)

1

c)

1/2

d)

none of these

12.

The inverse of the function  f(x)= ax  axax + ax   isf\left(x\right)=\ \frac{a^x\ -\ a^{-x}}{a^x\ +\ a^{-x}}\ \ \ is  

a)

 12loga(1+x1x)\frac{1}{2}\log_a\left(\frac{1+x}{1-x}\right)  

b)

   12loga(1x1+x)\frac{1}{2}\log_a\left(\frac{1-x}{1+x}\right)  

c)

  loga(1+x1x)\log_a\left(\frac{1+x}{1-x}\right)  

d)

none of these

13.

Let
  f(x)= sin1x +cos1x, then π2  f\left(x\right)=\ \sin^{-1}x\ +\cos^{-1}x,\ then\ \frac{\pi}{2}\ \   
is equal to 

a)

 f(12)f\left(\frac{-1}{2}\right)  

b)

 f(n22n +3)f\left(n^2-2n\ +3\right)  

c)

 f(32)f\left(\frac{3}{2}\right)  

d)

none of these

14.

if  cot1(n210n +216π) >π6\cot^{-1}\left(\frac{n^2-10n\ +21\cdot6}{\pi}\right)\ >\frac{\pi}{6}  
n is a natural number, then the minimum value of n is 

a)

3

b)

4

c)

2

d)

1

15.

Let A, B be two square matrices such that A + B = AB. Then

a)

AB = BA

b)

AB = - BA

c)

AB + 2BA = 0

d)

none of these

16.

The system of equations x + 2y + 3z = 4, 2x + 3y + 4z = 5, 3x +4y +5z = 6 has

a)

many solutions

b)

no solutions

c)

unique solutions

d)

none of these

17.

The differential coefficient of  tan1(sinx + cosxsinx  cosx) \tan^{-1}\left(\frac{\sin x\ +\ \cos x}{\sin x\ -\ \cos x}\right)\   with respect to x is 

a)

0

b)

 12\frac{1}{2}  

c)

1

d)

none of these

18.

If  f(x)= (ax1)3sin(xloga)log(1+x2loga2)f\left(x\right)=\ \frac{\left(a^x-1\right)^3}{\sin\left(x\log a\right)\log\left(1+x^2\log a^2\right)}  
is continuous at x = 0 then f(0) is 

a)

log a

b)

2 log a

c)

log(1/a)

d)

 loga\log\sqrt{a}  

19.

The second derivative of  a sin3t  with respect to acos3ta\ \sin^3t\ \ with\ respect\ to\ a\cos^3t  
at  t = π4 t\ =\ \frac{\pi}{4}\   is 

a)

 423a\frac{4\sqrt{2}}{3a}  

b)

2

c)

none of these

d)

 112a\frac{1}{12a}  

20.

 g(x)=1x1 f(x)=1x2+x2g\left(x\right)=\frac{1}{x-1}\ f\left(x\right)=\frac{1}{x^2+x-2}  
The points of discontinuity of the function fog  are

a)

x =  12\frac{1}{2}  , 2

b)

x =  \frac{1}{2}  , - 2

c)

1, 2

d)

1 , - 2

21.

The equation of motion of a stone thrown vertically upwards is s=ut  49t2s=ut\ -\ 4\cdot9t^2 . The maximum height attained by it is 

a)

 u298\frac{u^2}{9\cdot8}  

b)

 2u249\frac{2u^2}{4\cdot9}  

c)

 u2196\frac{u^2}{19\cdot6}  

d)

none of these

22.

Angle between the curves y = sin x

and y = cos x is

a)

π4\frac{\pi}{4}

b)

tan12\tan^{-1}\sqrt{2}

c)

tan122\tan^{-1}2\sqrt{2}

d)

none of these

23.

The equation x log x = 3 - x in the interval (1,3) has

a)

exactly one root

b)

at least one root

c)

at most one root

d)

none of these

24.

 0π2 cosx1 + sin2x dx  is\int_0^{\frac{\pi}{2}}\ \frac{\cos x}{1\ +\ \sin^2x}\ dx\ \ is  

a)

 π4\frac{\pi}{4}  

b)

 π2\frac{\pi}{2}  

c)

0

d)

none of these

25.

The area of the region bounded by y = 2x  x2y\ =\ 2x\ -\ x^2  
and x - axis is 

a)

 83 sq. units\frac{8}{3}\ sq.\ units  

b)

 43 sq. units\frac{4}{3}\ sq.\ units  

c)

 73 sq. units\frac{7}{3}\ sq.\ units  

d)

none of these

26.

Solution of

( 3x + 2y + 1) dx - ( 3x + 2y - 1) dy = 0 is

a)

log(15x + 10y -1) = c

b)

log(15x + 10y -1) + 52\frac{5}{2} ( x - y ) = c

c)

log(15x - 10y -1) = c

d)

none of these

27.

If G is the centroid of the triangle ABC then 
 GA\overrightarrow{GA}  +  GB\overrightarrow{GB}  +  GC\overrightarrow{GC}   is

a)

 0\overrightarrow{0}  

b)

 3GA3\overrightarrow{GA}  

c)

 3GB3\overrightarrow{GB}  

d)

 3GC3\overrightarrow{GC}  

28.

The equation of the plane through the line of intersection of the planes x + y + z - 6 = 0, 2x + 3y + 4z + 5 = 0 and passing through the point (1,1,1) is

a)

20x - 9y + 8z = 0

b)

20x + y + 8z = 0

c)

20x - 23y - 3z = 14

d)

20x + 23y + 26z - 69 = 0

29.

A coin is tossed. If head comes up, a die is thrown but if tail comes up the coin is tossed again. The probability of obtaining a head and an even number is

a)

1/4

b)

1/ 8

c)

3/8

d)

none of these

30.

The two curves x33xy2+2 =0 and x^3-3xy^2+2\ =0\ and\   
 3x2yy3=23x^2y-y^3=2  

a)

touch each other

b)

cut at an angle of  π3\frac{\pi}{3}  

c)

cut at an angle of  π4\frac{\pi}{4}  

d)

cut at an angle of  π2\frac{\pi}{2}