Number Series Ques 104

Question-

What will come in place of the question mark (?)

$\begin{array}{llllll}13 & 20 & 39 & 78 & 145 & \text { ? }\end{array}$

(1) 234

(2) 244

(3) 236

(4) 248

(5) None of these

Show Answer

Correct Answer: (4)

Solution: (4)

The pattern of the number series is :

$13+7=20$

$20+19(=7+12)=39$

$39+39(=19+20)=78$

$78+67(=39+28)=145$

$145+103(=67+36)$ $=248$