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# If m is an even integer, v is an odd integer, and m > v> 0, which of

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VP
Joined: 09 Mar 2018
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If m is an even integer, v is an odd integer, and m > v> 0, which of  [#permalink]

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Updated on: 07 Feb 2019, 22:53
carcass wrote:
If m is an even integer, v is an odd integer, and m > v > 0, which of the following represents the number of even integers less than m and greater than v ?

A. $$\frac{m-v}{2} -1$$

B. $$\frac{m-v-1}{2}$$

C. $$\frac{m-v}{2}$$

D. $$m-v-1$$

E. $$m-v$$

Let m = 4 and v = 3

Always remember to check all the values, if in some case you find 2 options satisfying the values take another value and we should be good.

4>3>0, here the number of even integers less than m and greater than v = 0

Put back the values in the answer options

We can get a zero from B and D, Now we will to test for some other value for m and v

m = 8 v = 1

8>1>0, number of even integers less than m and greater than v = 3

(8-1-1)/2 = 3

D says there are 6 such values

So B wins.
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Originally posted by KanishkM on 07 Feb 2019, 22:03.
Last edited by KanishkM on 07 Feb 2019, 22:53, edited 1 time in total.
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If m is an even integer, v is an odd integer, and m > v> 0, which of  [#permalink]

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07 Feb 2019, 22:26
1
KanishkM wrote:
carcass wrote:
If m is an even integer, v is an odd integer, and m > v > 0, which of the following represents the number of even integers less than m and greater than v ?

A. $$\frac{m-v}{2} -1$$

B. $$\frac{m-v-1}{2}$$

C. $$\frac{m-v}{2}$$

D. $$m-v-1$$

E. $$m-v$$

Let m = 4 and v = 3

4>3>0, here the number of even integers less than m and greater than v = 0

Put back the values in the answer options

We can get a zero from B

Always remember to check all the values, if in some case you find 2 options satisfying the values take another value and we should be good.

KanishkM , with those choices, we also get a zero from option D.
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VP
Joined: 09 Mar 2018
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Location: India
Re: If m is an even integer, v is an odd integer, and m > v> 0, which of  [#permalink]

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07 Feb 2019, 22:54
generis wrote:
KanishkM wrote:
carcass wrote:
If m is an even integer, v is an odd integer, and m > v > 0, which of the following represents the number of even integers less than m and greater than v ?

A. $$\frac{m-v}{2} -1$$

B. $$\frac{m-v-1}{2}$$

C. $$\frac{m-v}{2}$$

D. $$m-v-1$$

E. $$m-v$$

Let m = 4 and v = 3

4>3>0, here the number of even integers less than m and greater than v = 0

Put back the values in the answer options

We can get a zero from B

Always remember to check all the values, if in some case you find 2 options satisfying the values take another value and we should be good.

KanishkM , with those choices, we also get a zero from option D.

generis,

My reasoning backfired on me

I truly agree on that , said that,i have done the amendments.
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If you notice any discrepancy in my reasoning, please let me know. Lets improve together.

Quote which i can relate to.
Many of life's failures happen with people who do not realize how close they were to success when they gave up.
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If m is an even integer, v is an odd integer, and m > v> 0, which of  [#permalink]

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07 Feb 2019, 23:06
KanishkM wrote:
generis,

My reasoning backfired on me

I truly agree on that , said that,i have done the amendments.

KanishkM - mmm, not exactly.
Your reasoning is really solid —including the part
in which you tell us, correctly, that we should check each option.

No matter. Mistakes are how we learn.
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VP
Joined: 09 Mar 2018
Posts: 1002
Location: India
Re: If m is an even integer, v is an odd integer, and m > v> 0, which of  [#permalink]

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07 Feb 2019, 23:13
generis wrote:
KanishkM - mmm, not exactly.
Your reasoning is really solid —including the part
in which you tell us, correctly, that we should check each option.

No matter. Mistakes are how we learn.

generis

_________________
If you notice any discrepancy in my reasoning, please let me know. Lets improve together.

Quote which i can relate to.
Many of life's failures happen with people who do not realize how close they were to success when they gave up.
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Re: If m is an even integer, v is an odd integer, and m > v> 0, which of  [#permalink]

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09 Feb 2019, 01:14
carcass wrote:
If m is an even integer, v is an odd integer, and m > v > 0, which of the following represents the number of even integers less than m and greater than v ?

A. $$\frac{m-v}{2} -1$$

B. $$\frac{m-v-1}{2}$$

C. $$\frac{m-v}{2}$$

D. $$m-v-1$$

E. $$m-v$$

simply plugin m=6 and v= 3

4 ie. 1 digit even possible >3 <6 so
IMO B
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Re: If m is an even integer, v is an odd integer, and m > v> 0, which of  [#permalink]

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18 Mar 2019, 15:55
Hi here are my two cents for this questions.

If this question were to be marked based on options here is how i would go about solving it .

Well,
Option A, C can be ruled out for following reason.

$$\frac{odd}{Even}$$ is never Integer and we are looking for how many even integers would there be between v and m excluding m ,

and Option E gives number of integers between v and m, excluding either m or v

Which leaves us with choice B and D

Now choice B and D both gives us integers value but look at choice D . It actually gives us number of integers between v and m excluding both .

So our answer is Choice B

Lets do this algebraically.

if v is odd, then v+1 will be even . and if m is even

So we have number of integers between m and v+1 excluding one of the ends is = $$\frac{m-v-1}{2}$$

So we do have a formula for such type of questions

If we are counting in steps of x , from $$n_1$$ to $$n_z$$ including both end points we get $$\frac{n_z - n_1}{x}$$ +1

If we are counting in steps of x , from $$n_1$$ to $$n_z$$ including only one end points we get $$\frac{n_z - n_1}{x}$$

If we are counting in steps of x , from $$n_1$$ to $$n_z$$ excluding both end points we get $$\frac{n_z - n_1}{x}$$ -1
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Re: If m is an even integer, v is an odd integer, and m > v> 0, which of   [#permalink] 18 Mar 2019, 15:55

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