Question

5. The positive real root of the equation 81x-1=0 is
a) 9
b) 1/9
c) 1/18
d) 81
6. If one zero of the quadratic polynomial (k-1) x²+kx+1 is 2, then the value of k is:
a)-1/6
b)-1/2
c) 1/4
d) 1/2
7. The value of k for which, system of equations x+2y=3 and 5x+ky=7 has no solution
is
a) 10
b) -10
c) 5
d)-1
8. One card is drawn from a well shuffled deck of 52 cards, what is the probability
of getting a black jack?
a) 1/52
b) 1/26
c) 1/13
d) 3/26
9) A rational number between V2 and V3 is :
a) 1.4
b) 1.75
C) 1.45
d) 1.8
10. Which of the given rational numbers are terminating decimals?
i) 3/125
ii) 5/24
iii) 2/35
a) i only
b) lii only
c) il only
d) ii and fit
In Question Nos 11 to 15, fill in the blanks. Each question is of 1 mark:
11. The value of p for which one root of the quadratic equation px?- 14x+8 =0 is 6
times the other is
12. If nth term of an A.P is (2n+1), then the sum of its first three terms is..........
13. The perimeter of a triangle whose vertices are (0,4), (0,0) and (3,0) is
14. An integer is chosen between 20 and 60, then the probability that it is not
divisible by 7 is..............
15. In the given rectangle ABCD the values of x and y are ........ and
2x+y
x-y
5
25
2​

Answer 1

Answer:

d. 81 HOPE THIS WILL HELP YOU