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PostPosted: Fri Apr 24, 2020 5:31 pm 
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Hi, I am struggling with following NVR odd one out questions. Can someone please explain me reasons for these answers.

1. Image

The answer is C

2. Image

the answer is a

3. Image

The answer is e


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PostPosted: Fri Apr 24, 2020 10:18 pm 
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For the 3rd one I think those shapes are all identical but just rotated except for E which is a mirror image.
I'm afraid I'm hopeless at these though and can't do the others. In the first one I thought it might be too so with lines of symmetry but there are none in c or e so that doesn't work.


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PostPosted: Sat Apr 25, 2020 12:17 pm 
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The answer to 2 is a because all other shapes have at least one line of symmetry.Shape in a has no lines of symmetry


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PostPosted: Sat Apr 25, 2020 12:33 pm 
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Location: Manchester
In the 3rd one you have to look at the shape formed by the overlapping of the two open shapes very closely.
The shape formed in e has no line of symmetry because it is very slightly tilted as in a parallelogram:)
All others have got lines of symmetry


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PostPosted: Sat Apr 25, 2020 12:42 pm 
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Thank you. This makes sense now.

Nadia wrote:
The answer to 2 is a because all other shapes have at least one line of symmetry.Shape in a has no lines of symmetry


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PostPosted: Sat Apr 25, 2020 5:44 pm 
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1. Look at the centre shape, where the two have merged to overlap. Ignore the overlap and count the sides

Shape a = 2 sides Shape b = 8 sides Shape c = 7 sides Shape d = 6 sides Shape e = 8 sides

Therefore a,b,d and e have in common an even number of sides, leaving c as the odd one out.

2. b,c,d and e have in common at least one line of symmetry, shape a has no lines of symmetry and therefore the odd one out

3. a,b,c and d are identical apart from rotation. Shape e cannot be rotated to look like the others and therefore the odd one out

Patricia


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PostPosted: Sun Apr 26, 2020 2:00 pm 
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Thank you Patrica. I understand question 2 and 3 but i am struggling with question 1. When i count the sides, this is what i get, can you please tell what i am doing wrong here. I am getting 6 sides for shape c instead of 7 and 9 sides for shape 3 instead of e. Many thanks in advance:

Image

patricia wrote:
1. Look at the centre shape, where the two have merged to overlap. Ignore the overlap and count the sides

Shape a = 2 sides Shape b = 8 sides Shape c = 7 sides Shape d = 6 sides Shape e = 8 sides

Therefore a,b,d and e have in common an even number of sides, leaving c as the odd one out.

2. b,c,d and e have in common at least one line of symmetry, shape a has no lines of symmetry and therefore the odd one out

3. a,b,c and d are identical apart from rotation. Shape e cannot be rotated to look like the others and therefore the odd one out

Patricia


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PostPosted: Sun Apr 26, 2020 9:45 pm 
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In question 1, the 2 overlapping shapes form a new shape plus the remains of the old shapes. In all cases apart from c, the 2 old shapes have the same number of sides eg in b, you form a central 4 sided shape surrounded by 2x 6 sided shapes. However, in c, you form a central triangle surrounded by a 6 sided shape above and a 4 sided shape below.


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PostPosted: Mon Apr 27, 2020 5:52 am 
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BerksParent wrote:
Thank you Patrica. I understand question 2 and 3 but i am struggling with question 1. When i count the sides, this is what i get, can you please tell what i am doing wrong here. I am getting 6 sides for shape c instead of 7 and 9 sides for shape 3 instead of e. Many thanks in advance:


Hi Berksparent

You are counting all sides, you need to count sides ignoring the overlapping shape

shape c therefore has 7 sides (you didn't count the small sides above your 3 and 4)

Shape e you have counted line 5 as one but its two as you need to ignore the overlap in the middle



Hi Glos18

I agree with your method too.

Patricia

I always say, if in doubt start counting.


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PostPosted: Mon Apr 27, 2020 9:33 am 
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Hi Patrica,

This makes perfect sense now.

Glos18 - understood your logic as well.

Thank you so much.

patricia wrote:
BerksParent wrote:
Thank you Patrica. I understand question 2 and 3 but i am struggling with question 1. When i count the sides, this is what i get, can you please tell what i am doing wrong here. I am getting 6 sides for shape c instead of 7 and 9 sides for shape 3 instead of e. Many thanks in advance:


Hi Berksparent

You are counting all sides, you need to count sides ignoring the overlapping shape

shape c therefore has 7 sides (you didn't count the small sides above your 3 and 4)

Shape e you have counted line 5 as one but its two as you need to ignore the overlap in the middle



Hi Glos18

I agree with your method too.

Patricia

I always say, if in doubt start counting.


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