The number of flights leaving a certain airport doubles during every one-hour period between its 9 am opening and noon; after noon, the number of flights leaving from the airport doubles during every two-hour period if 4 flights left from the airport between 9 am and 10 am, how many flights left airport between 2 pm and 4 pm?

IFIC Bank MTO Mathematics-2013

1. The number of flights leaving a certain airport doubles during every one-hour period between its 9 am opening and noon; after noon, the number of flights leaving from the airport doubles during every two-hour period if 4 flights left from the airport between 9 am and 10 am, how many flights left airport between 2 pm and 4 pm?

[IFIC Bank MTO-2013 : 2013]

1. 128

2. 32

3. 48

4. 64

5. None Of these

Answer

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