Number Series Ques 142

Question-

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

20, 29, 45, 70, ?, 155

(1) 90

(2) 206

(3) 110

(4) 106

(5) 130

Show Answer

Correct Answer: (4)

Solution: (4)

The pattern is :

$20+3^{2}=20+9=29$

$29+4^{2}=29+16=45$

$45+5^{2}=45+25=70$

$70+6^{2}=70+36=106$

$106+7^{2}=106+49=155$