Which of the following is not a polygon?

a) only (iii) b) (ii) and (iii)
c) only (ii) d) (i),(ii) and (iii)

Q. Which of the following is/are not matter?​

I) Books


II) Ink

III) Happiness

A. Only II​
B. Only III​
C. Both I and III​
D. Both II and III

Q.

Which of the following series forms an AP?

(i) a – 2d, a – d, a, a + d, a + 2d

(ii)a, a + d, a + 2d, a + 3d, a + 4d

(iii) a – 3d, a – d, , a + d, a + 3d

Q. In the given figure, which of the following statements must be true?
(i) a + b = d + c

(ii) a + c + e = 180°

(iii) b + f = c + e

(a) (i) only

(b) (ii) only

(c) (iii) only

(d) (ii) and (iii) only

Q.

Which of the following graphs represents exothermic reaction ?

(a) Only I
(b) Only II
(c) Only III
(d) I and II

Q. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only