Question

DBhSS Mon, Nagaland Mid Term Examination-2020 Class 9 Mathematies Full Mark
Section-
Choose the correct answer from the given alternativer
1 The ash ofy is a straight line parallel to:
both axes w.none of these
2. The coordinates of the point where 3x-5=y meets the*-aisare
3. ABCD is a quadrilateral in which P.Q.Rands are midpoints of the sides A, C, CD and DA
respectively. If BD = 12 cm, then the length of Opis: 3cm cm mm
4. The mean of first four even numbers is
5. Which of the following is not a form of linear equation in two variables?
Lax+by+c=0
6. The graph of ax + by+c=0 is a straight line parallel tox-axis il a straight line
tay-axis a general straight line none of these
Section-
7. Find the value of k, if x 2.1k a solution of the equation 2x3**
8. In a Mathematics test given to 15 students, the following marks out of 1001 are recorded
70, 41, 39, 48, 52, 45, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60. Find the median and mode of this data
9. The following observations have been arranged in ascending order.
If the median of the data is 63, find the value of x 29.32, 48, 50,x.x+2), 72, 73, 84.95.
Section-
10. Draw a square whose sides are x = 5,x=-5, y = 5.7-5.
11. Show that the diagonals of a square are equal and bisect each other at night angle
12. Construct an equilateral triangle, given its sides and justify the construction
13. A company manufacturers car batteries of a particular type. The lives in years) of 40 such a
were recorded as follows:
2.6 3.0 3.7 3.2 22 41 3.5 4.5 3.5 23
3.2 3.4 3.8 32 45 37 2.5 44 34 33
29 30 43 28 35 3.2 3.9 32 32 3.1
37 3.4 4.5 38 3.2 26 35 42 20 36
14. Find the mean salary of 60 workers of a factory from the following table:
Salary(In Rupees: 30004000 5000 6000 7000 8000 9000 10000 Total
No. of workers :16 12 10 8 6 4 3 : 60
15. If the diagonals of a parallelogram are equal, then show that it is a rectangle
Section-D
16. The force exerted to pull a cart is directly proportional to the acceleration produced in the
Express this statement as a linear equation in two variables and draw the graph of the same bu
the constant mass equal to 6 kg. Read from the graph the force required when the acceleratio
produced is: 15 m/sec 1.6 m/sec
17. Construct a triangle ABC in which ac=8 cm, ta = 45and AB-AC-35 cm fraces of cons
only is required)
18. Construct a triangle XYZ in which ty - 30",X = 90% and XY+Y2+2x11 cm. (Traces of con
only is required)
19. The length of 40 leaves of a plantare measured correct to one millimeter and the one
represented in the following table
thin mm: 118 - 126 127 135 136 124 125 - 153 154-162 163-1712​

Answer 1

Answer:

18. Because all the construct of triangle is traces on con only is required.

Answer 2

$\LARGE{ \underline{\underline{ \orange{ \bf{Required \: answer:}}}}}$

Given:

20, 10, 15, 42, 29, 35

To Find:

Median

Formula:

As, the total number of numbers given is even.

(n+1)/2 th term

Solution:

(15 + 42 + 1) / 2

58/2

29

Therefore,

$\LARGE{\blue{ \bf{Median = 29 \: Ans}}}$