series

Question

Find out the wrong one in the series 7, 8,18,57,228,1165,6996.

Answer 1

 

Hence,$228$ is the wrong number here.

Answer 2

The pattern of the given series is as follows:

• $7*1+1=8$
• $8*2+2=18$
• $18*3+3=57$
• $57*4+4=232$
• $232*5+5=1165$
• $1165*6+6=6996$

So the incorrect term is $228$