Question

3, 12, 27, 48, 75, 108,
1) 141
2) 143
3) 145
4) 147

Answer 1

4) 147
The difference between each pair of numbers increases by 6. 
The difference between 3 & 12 is 9. Difference between 12 & 27 is 9+6=15. Difference between 27 and 48 is 15+6=21, and so on. Between 75 and 108 we have a difference of 33. Therefore on adding 33+6= 39 to 108 we get the next number which is 147.
Hope this helps.

Answer 2

147 is the answer...