Question

Complete the series by finding the missing term from the given alternatives.
1, 5, 7, 14, 18, 20, 40, 44, 46, ?

• A. 48
• B. 50
• C. 52
• D. 92

Answer 1

Answer: (D)

92

The series goes like

2${}^{nd}$ term = 1${}^{st}$ term$+4=5$

3${}^{rd}$ term = 2${}^{nd}$ term$+2=7$

4${}^{th}$ term = 3${}^{rd}$ term$\times 2=14$

Again continues in the same manner

5${}^{th}$ term= 4${}^{th}$ term$+4=18$

6${}^{th}$ term= 5${}^{th}$ term$+2=20$

7${}^{th}$ term= 6${}^{th}$ term$\times 2=40$

8${}^{th}$ term= 7${}^{th}$ term$+4=44$

9${}^{th}$ term= 8${}^{th}$ term$+2=46$

10${}^{th}$ term=9${}^{th}$ term$\times 2=92$

Hence $92$ replaces question mark.