Let’s go row by row and find the shape that doesn’t belong.
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Row 1:
Shapes:
- Red triangle (3 sides)
- Yellow trapezoid (4 sides)
- Purple square (4 sides, tilted)
- Pink diamond/rhombus (4 sides)
→ The red triangle has
3 sides, all others have
4 sides.
✔ Odd one out:
Red triangle
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Row 2:
Shapes:
- Cyan diamond (4 straight sides)
- Light purple rectangle (4 straight sides)
- Green oval (curved, no straight sides)
- Purple square (4 straight sides)
→ The green oval is the only one with
no straight edges — it’s curved.
✔ Odd one out:
Green oval
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Row 3:
Shapes:
- Pink diamond (4 sides)
- Green trapezoid (4 sides)
- Red triangle (3 sides)
- Yellow trapezoid (4 sides)
→ Again, the red triangle has
3 sides, others have 4.
✔ Odd one out:
Red triangle
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Row 4:
Shapes:
- Purple square (4 equal sides, right angles)
- Yellow triangle (3 sides)
- Cyan rectangle (4 sides)
- Pink parallelogram (4 sides)
→ The yellow triangle has
3 sides, others have 4.
✔ Odd one out:
Yellow triangle
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Final Answer:
Row 1: Red triangle
Row 2: Green oval
Row 3: Red triangle
Row 4: Yellow triangle
Parent Tip: Review the logic above to help your child master the concept of 3rd grade math reasoning worksheet.
