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# How many possible 4-digit numbers can be created where the thousands

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Math Expert
Joined: 02 Sep 2009
Posts: 61283
How many possible 4-digit numbers can be created where the thousands  [#permalink]

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28 Dec 2016, 00:49
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Difficulty:

15% (low)

Question Stats:

88% (01:31) correct 12% (02:18) wrong based on 72 sessions

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How many possible 4-digit numbers can be created where the thousands digit and the tens digit are both prime and the number is divisible by 5?

A. 10,000
B. 800
C. 320
D. 160
E. 32

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Joined: 07 Mar 2015
Posts: 108
Location: India
Concentration: General Management, Operations
GMAT 1: 590 Q46 V25
GPA: 3.84
WE: Engineering (Energy and Utilities)
Re: How many possible 4-digit numbers can be created where the thousands  [#permalink]

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28 Dec 2016, 01:01
Bunuel wrote:
How many possible 4-digit numbers can be created where the thousands digit and the tens digit are both prime and the number is divisible by 5?

A. 10,000
B. 800
C. 320
D. 160
E. 32

Four digit so : -- -- -- --

First one prime number so : 2 3 5 7 : 4 chance
Second number : 0-9 : 10 chnace
Third number : 2 3 5 7 : 4 chance
fourth number : 0 or 5 : 2 chance

so 4*10*4*2 = 320
Re: How many possible 4-digit numbers can be created where the thousands   [#permalink] 28 Dec 2016, 01:01
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