Number Series Ques 174

Question-

Find the wrong term in the following series.

$5531\quad 5506\quad 5425\quad 5304\quad 5135\quad 4910\quad 4621$

(1) 5531

(2) 5425

(3) 4621

(4) 5135

(5) 5506

Show Answer

Correct Answer: (1)

Solution: (1)

The pattern is :

$5531-5506=25=5^{2}$

$5555-5506=49=7^{2}$

$5506-5425=81=9^{2}$

$5425-5304=121=11^{2}$

$5304-5135=169=13^{2}$

$5135-4910=225=15^{2}$

$4910-4621=289=17^{2}$

Clearly, 5531 is wrong which should be substituted by 5555.