Number Series Ques 78

Question-

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

$45 \quad 57 \quad 67 \quad 75 \quad 81 \quad$ ?

(1) 89

(2) 85

(3) 105

(4) 91

(5) 78

Show Answer

Correct Answer: (2)

Solution: (2)

The pattern is :

$45+12=57$

$57+10=67$

$67+8=75$

$75+6=81$

$81+4=85$