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Consecutive interger

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by harrybm » Thu Feb 02, 2012 12:38 am
143) List k consists of 12 consecutive integers. If -4 is the least integer in list K, what is the range of positive integers in list K?
a. 5
b. 6
c. 7
d. 11
e. 12


I answer 7, but its wrong. here is my explanation

set of 12 intergers = (-4, -3, -2, -1, 0 , 1, 2, 3, 4, 5, 6, 7)
Range (widest distance) = 7 - 0 = 7

Can someone help whats wrong with my reasoning?
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by shankar.ashwin » Thu Feb 02, 2012 12:53 am
Your list is correct.. However the range = |max - min| = |7 - (1)| = 6

Not sure why you subtracted 7 with 0.. 0 is not a positive integer..

Hope that helps.
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by harrybm » Thu Feb 02, 2012 1:14 am
shankar.ashwin wrote:Your list is correct.. However the range = |max - min| = |7 - (1)| = 6

Not sure why you subtracted 7 with 0.. 0 is not a positive integer..

Hope that helps.
Maybe its a silly question, but why do you minus 1? what 1 represents?
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by shankar.ashwin » Thu Feb 02, 2012 2:18 am
harrybm wrote:
Maybe its a silly question, but why do you minus 1? what 1 represents?
You're asked range of positive integers in the set...

+ve integers are integers > 0.

1 is the lowest +ve integer and 7 is the greatest in the set..

Therefore, range = 7-1 = 6
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by somsubhra86 » Sun Feb 05, 2012 7:54 am
range is greater no - least no.

ie. in this probs

7-(-4)=11.

Am i correct
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by karanrulz4ever » Sun Feb 05, 2012 8:54 am
somsubhra86 wrote:range is greater no - least no.

ie. in this probs

7-(-4)=11.

Am i correct
Yes you are...but it is asked to find the range of positive integers...

The answer is 7-1 = 6.
Last edited by karanrulz4ever on Mon Feb 06, 2012 11:20 am, edited 1 time in total.
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by Anurag@Gurome » Sun Feb 05, 2012 5:39 pm
harrybm wrote:143) List k consists of 12 consecutive integers. If -4 is the least integer in list K, what is the range of positive integers in list K?
a. 5
b. 6
c. 7
d. 11
e. 12


I answer 7, but its wrong. here is my explanation

set of 12 intergers = (-4, -3, -2, -1, 0 , 1, 2, 3, 4, 5, 6, 7)
Range (widest distance) = 7 - 0 = 7

Can someone help whats wrong with my reasoning?
Consecutive integers are integers that follow each other in order. They have a difference of 1 between every two numbers. So, the list k = {-4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7}

Now we have to find the range of positive integers and range is the difference between the highest and lowest integers.
Here positive integers are 1, 2, 3, 4, 5, 6, 7. Note that 0 is not a positive integer.
So, the range of positive integers = 7 - 1 = 6

The correct answer is B.
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