Question

Identify the term that will replace the ?

$78,79,81,?,92,103,119$

• A. $88$
• B. $85$
• C. $84$
• D. $83$

Answer 1

Answer: (B)

$85$

This series follows a pattern,

Second term $=$ 1st term $+(1+0)=78+1=79,$

Third term $=$ 2nd term $+(1+1)=79+2=81,$

Fourth term $=$ 3rd term $+(2+2)=81+4=85,$

Fifth term $=$ 4th term $+(4+3)=85+7=92,$

Sixth term $=$ 5th term $+(7+4)=92+11=103,$

Seventh term $=$ 6th term $+(11+5)=103+16=119$

Thus, $85$ replaces question mark.