300
336
420
525
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Answer : Option B
Explanation :
The pattern is + 36, + 60, + 90,.....i.e. + [6 x (6 + 0)], + [6 x (6 + 4)], + [6 x (6 + 9)],...So, missing term = 210 + [6 x (6 + 15)] = 210 + 126 = 336.
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