Number Series Ques 15

Question-

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

$13 \quad 6 \quad 5 \quad 6 \quad 10 \quad$ ?

(1) 19

(2) 25

(3) 17.5

(4) 28

(5) 22.5

Show Answer

Correct Answer: (5)

Solution: (5)

The pattern is:

$13 \times 0.5-0.5=6.5-0.5=6$

$6 \times 1-1=6-1=5$

$5 \times 1.5-1.5=7.5-1.5=6$

$6 \times 2-2=12-2=10$

$10 \times 2.5-2.5=25-2.5$ $=22.5$