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If N is a positive integer, what is the tens digit of N?

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If N is a positive integer, what is the tens digit of N? [#permalink]

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New post 07 Mar 2016, 07:53
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Re: If N is a positive integer, what is the tens digit of N? [#permalink]

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New post 07 Mar 2016, 19:17
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St1 : number can be 25, 50 etc

InSufficient

St2: number can be 16, 32 etc
Insufficient

St1 & St 2
finding LCM of 16 and 25 = 400

so all multiple of 400 will be : 400 , 800, 1600
tens digit is = 0

Ans: C

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Re: If N is a positive integer, what is the tens digit of N? [#permalink]

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New post 09 Mar 2016, 20:42
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Here is my approach =>
statement 1 tells us Unit digit can be 0 or 5 => not sufficient
statement two tells us the unit digits must be even => not sufficient
Combining them => unit digits must be zero => C is sufficient
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Re: If N is a positive integer, what is the tens digit of N? [#permalink]

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New post 10 Mar 2016, 01:07
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Bunuel wrote:
If N is a positive integer, what is the tens digit of N?

(1) N is divisible by 25.

(2) N is divisible by 16.


Given: N > 0 and integer
Required: Tens digit of N?

Statement 1: N is divisible by 25
N = 25 or 50
Hence we cannot tell the tens digit.
INSUFFICIENT

Statement 2: N is divisible by 16
N = 16 or 32
We cannot tell the tens digit
INSUFFICIENT

Combining Statement 1 and Statement 2:
N is a multiple of both 16 and 25
Hence N is a multiple of 400
N = 400, 800, ...
In all the cases, the tens digit will be 0
SUFFICIENT

Option C

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Re: If N is a positive integer, what is the tens digit of N? [#permalink]

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New post 15 Mar 2016, 08:29
Here Clearly 1 and 2 statement are not sufficient as there are numerous values.
combining the we can say that tens digit will be 0
hence C
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Re: If N is a positive integer, what is the tens digit of N? [#permalink]

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New post 06 Nov 2017, 12:36
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Re: If N is a positive integer, what is the tens digit of N?   [#permalink] 06 Nov 2017, 12:36
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