Question

Follow the pattern given below:
3, 7, 11, 15, _ , 23, ...
Find the missing term.

• A. 21
• B. 17
• C. 18
• D. 19

Answer 1

The correct option is D 19

The given pattern is
3, 7, 11, 15, _ , 19, 23, ...
First term is $3=4\times 1-1$,
Second term is $7=4\times 2-1$,
Third term is $11=4\times 3-1$
Fourth term is $15=4\times 4-1$

It can be observed that the general term of the pattern is 4n - 1.
Hence, the fifth term is $4\times 5-1=19$