What will come in place of the question mark (?) in the following number series? 5, 10, 15, 20, ? MCQ with Answer and Explanation

Explanation:
The differences between consecutive terms are: 3, 5, 7, 9. These are consecutive odd numbers. The next difference should be 11. Therefore, the next term is 27+11=38.[reference:5]

Explanation:
The differences are: 14, 18, 22, 26. These are increasing by 4. The next difference is 30. Therefore, 90+30=120.

Explanation:
The differences are: 4, 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 30+12=42.