Number Series Ques 180

Question-

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

$23 \quad 42.2 \quad 80.6 \quad 157.4 \quad 311\quad ?$

(1) 618.2

(2) 623.2

(3) 624.2

(4) 616.6

(5) None of these

Show Answer

Correct Answer: (1)

Solution: (1)

The pattern is:

$23+1 \times 19.2=42.2$

$42.2+2 \times 19.2=80.6$

$80.6+4 \times 19.2=157.4$

$157.4+8 \times 19.2=311$

$311+16 \times 19.2=311+307.2$ $=618.2$