Which of the following numbers will replace the question mark (?) in the given series?
3,  3.5,  4.5,  6,  8,  ?

Logic: The series increases by consecutive increments of 0.5, starting from 0.5

3 + 0.5 = 3.5

3.5 + 1 = 4.5

4.5 + 1.5 = 6

6 + 2 = 8

Similarly, the next term will be:

8 + 2.5 = 10.5

Thus, the correct option is (c)