### 1 Marks Questions for practice

1.What is the common difference of an A.P; in which a18-a14= 32?

(a)8

(b)-8

(c)-4

(d)4

2.In figure, OR is common tangent to the given circles, touching externally at the point T .The tangent at T meets QR at P.If PT =3.8 cm, then the length of QR (in cm) is

(a)3.8

(b)7.6

(c)5.7

(d)1.9

(b)7.6

(c)5.7

(d)1.9

3.The product of a non-zero rational and an irrational number is:

(a) always irrational.

(b) always rational

(c) rational or irrational.

(d) one.

4. The number of polynomials having zeros as -2 and 5 is :

(a) 1

(b) 2

(c) 3

(d) more than 3

5.sin 2A= 2 sin A is true when A=

(a) 0

(c) 45

(b) 30

(d) 60

6. If the perimeter of a circle is equal to that of a square, then the ratio of their areas is:

(a) 22:7

(b) 14:11

(b) 14:11

(c) 7:22

(d) 11:14

7.The probability of getting a bad egg in a lot of 400 is 0.035. The number of bad eggs in the lot is

(a) 7

(b) 14

(c) 21

(b) 14

(c) 21

(d) 28

8.For some integer m, every even integer is of the form:

(a)m

(a)m

(b) m+1

(c)2m

(c)2m

(d) 2m+ 1

9.The first four terms of an AP, whose first term is-2 and the common difference is-2, are

(a) -2,0,2,4

(b) -2,4,-8,16

(c)-2,-4,-6,-8

(d) - 2 ,-4,-8,-16

10.In the A.P 2, x, 26, then find the value of x.

11.Are two triangles having corresponding sides equal are similar.

12.A letter of English alphabet is chosen at random. Determine the probability that the chosen letter is a consonant.

13.Find the volume of the largest right circular cone that can be cut off from a cube of edge 4.2 cm.

14.What is the maximum number of parallel tangents a circle can have on a diameter?

15. If the nth term of an A.P-1, 4,9, 14,... is 129. Find the value of n.

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