Odd One Out — Shapes

Joyful Mathematics 2 — Shapes Around Us. Grouping shapes by sides and corners in Shapes Around Us is the same skill as odd-one-out.

• In odd one out, three or four items are alike and one is different.
• For shapes, look at sides, corners, and roundness.
• Say why the odd one is different.

Verbal: Find the shape that breaks the rule — count sides and corners, not colour or size.

Symbolic: Triangle = 3 sides; square = 4; circle = 0 corners. Rule → pick the different shape.

Level 1 — Shape clues

Level 1 — Count sides

Triangle = 3, Square = 4, Pentagon = 5.

Level 2 — Same colour trick

Shapes may look alike in colour — still check shape.

Level 2 — Method

1. Name each shape 2) Find the rule 3) Pick the breaker

Indian real life

Connect this idea to your daily routine at home, school, or the local market in India.

Odd one out: circle, circle, square, circle

Step 1 — Three circles, one square
Step 2 — Rule: all should be circles
Step 3 — **Square** has straight sides; circles are round
Answer: square

• Odd one: triangle, triangle, triangle, circle
• Why is a rectangle odd among three squares?
• Draw two shapes that belong together and one odd.

Stretch: Make a set of four shapes where the odd one is a pentagon among squares — explain your rule.

Revision tip: Draw shapes on cards — sort by side count before picking the odd one.

Open the Practice tab for graded questions on Odd One Out — Shapes.