78, 155, 309, ? , 1233...

78, 155, 309, ? , 1233

A

1230

B

1000

C

617

D

625

लिखित उत्तर

Verified by Experts

The correct Answer is:

C

`78xx2-1=155`
`155xx2-1=309`
`309xx2-1=617`
`617xx2-1=1233`

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