Find the missing number in the series.0,6,24,60,120,…………,336
210
220
240
260
It is double line difference
⇒ 6-0=6
⇒ 24-6=18
⇒ 60-24=36
⇒ 120-60=60
⇒ x-120=
⇒ 336-x=
Next difference in series of answer we got in first difference
⇒ 18-6=6
⇒ 36-18=18
⇒ 60-36=24
In the above series difference is 6=30-24
⇒ y-60=30
⇒ y=30+60=90
⇒ 90-z=36
⇒ z=90+36
⇒ z=126
so series, 120+90=210
The correct option is (A):210