A dealer in Lucknow (U.P.) sells goods worth ₹ 50,000 to a dealer in Agra (U.P.). If the rate of GST is 18%, the CGST is :

1. ₹ 3,000

2. ₹ 6,000

3. ₹ 4,500

4. Nil

If on dividing 4x² - 3kx + 3 by (x + 2), the remainder is k - 1, then the value of k is :

1. 4

2. -4

3. 3

4. -3

If a - 1, a + 3, 3a - 1 are in A.P. then the value of a is :

1. 2

2. 4

3. -2

4. -4