The sum of first 10 even whole numbers is

1. 110

2. 90

3. 55

4. 45

The 11th term of the G.P. $\dfrac{1}{8}, -\dfrac{1}{4}, 2, -1, ….$ is

1. 64

2. -64

3. 128

4. -128

If k, 2(k + 1), 3(k + 1) are three consecutive terms of a G.P., then the value of k is

1. -1

2. -4

3. 1

4. 4

Given is a sequence of three terms : -1, -5, -9,……

Assertion (A): They are consecutive term of an arithmetic progression.

Reason (R): Difference between two successive term is -3.

1. Assertion (A) is true, but Reason (R) is false.

2. Assertion (A) is false, but Reason (R) is true.

3. Both Assertion (A) and Reason (R) are correct, and Reason (R) is the correct reason for Assertion (A).

4. Both Assertion (A) and Reason (R) are correct, and Reason (R) is incorrect reason for Assertion (A).