CCAT Spatial Reasoning: Odd One Out 2 — Questions and Answers
Question 1: Which shape is the odd one out? A) Square B) Rectangle C) Rhombus D) Trapezoid
- Square
- Rectangle
- Rhombus
- Trapezoid (Correct answer)
Correct answer: Trapezoid
Square, rectangle, and rhombus are parallelograms (two pairs of parallel sides). A trapezoid has only one pair of parallel sides.
Parallelograms have two pairs of parallel opposite sides — squares, rectangles, and rhombuses all qualify. A trapezoid has exactly one pair of parallel sides, making it the odd one out.
Question 2: Which 3D shape is the odd one out based on having at least one flat face? A) Cube B) Sphere C) Cylinder D) Cone
- Cube
- Sphere (Correct answer)
- Cylinder
- Cone
Correct answer: Sphere
Cubes, cylinders, and cones all have at least one flat face. A sphere has no flat faces.
A cube has 6 flat faces. A cylinder has 2 flat circular faces. A cone has 1 flat circular base. A sphere has no flat faces — its entire surface is curved.
Question 3: Which letter is the odd one out based on vertical symmetry? A) A B) B C) H D) T
- A
- B (Correct answer)
- H
- T
Correct answer: B
A, H, and T have vertical lines of symmetry. B only has a horizontal line of symmetry.
Vertical symmetry: A (symmetric), H (symmetric), T (symmetric). B is symmetric horizontally (top-bottom) but not vertically (left-right). B is the odd one out.
Question 4: Which is the odd one out based on having at least one line of symmetry? A) Equilateral triangle B) Square C) Regular pentagon D) Scalene triangle
- Equilateral triangle
- Square
- Regular pentagon
- Scalene triangle (Correct answer)
Correct answer: Scalene triangle
Equilateral triangles, squares, and regular pentagons all have multiple lines of symmetry. A scalene triangle has none.
Equilateral triangle: 3 lines of symmetry. Square: 4. Regular pentagon: 5. Scalene triangle: 0 lines of symmetry (all three sides differ). Scalene triangle is the odd one out.
Question 5: Which is the odd one out based on having an even number of sides? A) Pentagon B) Hexagon C) Octagon D) Decagon
- Pentagon (Correct answer)
- Hexagon
- Octagon
- Decagon
Correct answer: Pentagon
Hexagon (6), octagon (8), and decagon (10) have even sides. Pentagon (5) has an odd number.
Pentagon = 5 sides (odd). Hexagon = 6 (even). Octagon = 8 (even). Decagon = 10 (even). The pentagon is the only one with an odd number of sides.
Question 6: Tools: compass, protractor, ruler, calculator. Which is the odd one out for 'used to measure angles'?
- Compass
- Protractor
- Ruler (Correct answer)
- Calculator
Correct answer: Ruler
A protractor measures angles directly. A compass draws arcs used in angle construction. A ruler measures lengths, not angles.
Protractor: measures angles directly. Compass: constructs angles via arcs. Calculator: computes trigonometric values. Ruler: measures straight-line lengths, not angles. The ruler is the odd one out for angle-related tasks.
CCAT Spatial Reasoning: Odd One Out 2
Which shape is the odd one out? A) Square B) Rectangle C) Rhombus D) Trapezoid