Value of m for which quadratic equation 2x² - mx + m = 0 has equal roots, is :

1. 4

2. 8

3. -4

4. -8

The n^th term of an A.P. is 2n - 5, then the sum of its first 6 term is :

1. 12

2. 15

3. -48

4. -12

In the given figure, AD = 4 cm, AB = 12 cm, AC = 18 cm and ∠ADE = ∠ABC, then CE is equal to :

1. 6 cm

2. 9 cm

3. 4 cm

4. 12 cm

A hard card-board is cut in the shape as shown alongside. It is given a full round about its line of symmetry (shown by the dotted line). The solid so formed has :

(i) One cone and one cylinder

(ii) Two cones and one cylinder

(iii) One cone and two cylinders.

Which of the statements given above is true ?

1. only (i)

2. only (ii)

3. only (iii)

4. (ii) and (iii)