Question

Whitney drew some images based on certain patterns. She noticed that one image did not follow the rule. Help her find the odd one out.

• A. 3
• B. 6
• C. 2
• D. 5

Answer 1

The correct option is A 3

Image 1:

Number of sides of the polygon = 6
Number of dots = 4

∴ Difference between sides and number of dots = 6 – 4 = 2

Image 2:

Number of sides of the polygon = 4
Number of dots = 2

∴ Difference = 4 – 2 = 2

Image 3:

Number of sides of the polygon = 8
Number of dots = 5

∴ Difference = 8 – 5 = 3

Image 4:

Number of sides of the polygon = 10
Number of dots = 8

∴ Difference = 10 – 8 = 2

Image 5:

Number of sides of the polygon = 7
Number of dots = 5

∴ Difference = 7 – 5 = 2

Image 6:

Number of sides of the polygon = 5
Number of dots = 3

∴ Difference = 5 – 3 = 2

So, for all images except image 3,
Number of dots = Number of sides – 2

Hence, image 3 is the odd one.