4, 20, 80, 240, …….
A320
B480
C540
D600
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Related Questions:
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
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7 ,19 , 39 , 67 , ___
Select the number from among the given options that can replace the question mark (?) in the following series.
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