In the given series find the number which is wrong.
215,28,63,126,7,343
Select
A) 215
B) 28
C) 126
D) 343
E) 625
215=6*6*6-1   28=3*3*3+1   63=4*4*4-1   126=5*5*5+1   7=2*2*2-1   343 should be   7*7*7+1= 
<gadget id="calculator">  7*7*7+1</gadget>
<output>344</output>
344 but it is 343   ANSWER:343
<result>D</result>
In the given series find the number which is wrong.
215,28,63,126,7,343