Plant Operator Selection System Test Plant Operator Selection System Abstract Pattern Recognition 5 — Questions and Answers
Question 1: In a series, each shape is divided into one more equal part than the previous. Shape 1 is undivided, shape 2 is halved. How many parts does shape 5 have?
- 5 (Correct answer)
- 4
- 6
- 8
Correct answer: 5
Shape 1=1 part, shape 2=2 parts, shape 3=3, shape 4=4, shape 5=5 parts.
Question 2: Three figures form a group: pentagon, hexagon, heptagon. A second group starts with a square. Applying the same +1-side progression, what is the third figure in the second group?
- Hexagon (Correct answer)
- Pentagon
- Heptagon
- Octagon
Correct answer: Hexagon
Square (4) → pentagon (5) → hexagon (6), so the third figure is a hexagon.
Question 3: A figure is reflected vertically (top-bottom flip) then rotated 180°. Compared to the original, what is the net transformation?
- Horizontal reflection only (Correct answer)
- No change — returns to original
- Vertical reflection only
- 90° rotation
Correct answer: Horizontal reflection only
A vertical flip followed by a 180° rotation is equivalent to a horizontal reflection.
Question 4: In a pattern, small shapes are inside large shapes. The rule is: the number of small shapes inside = number of sides of the large shape minus 2. A large pentagon contains how many small shapes?
- 3 (Correct answer)
- 5
- 2
- 4
Correct answer: 3
Pentagon has 5 sides; 5 − 2 = 3, so there are 3 small shapes inside.
Question 5: A sequence of figures grows by adding one shape to the right at each step. Step 1 = one circle, step 2 = circle-square, step 3 = circle-square-triangle. Step 4 adds which shape if the pattern cycles back to circle?
- Circle (Correct answer)
- Square
- Triangle
- Pentagon
Correct answer: Circle
The shapes cycle: circle, square, triangle, circle, so step 4 adds a circle.
Question 6: An odd-one-out question: three figures are rotations of the same shape; one figure is a reflection. Which is the odd one out?
- The reflected figure (Correct answer)
- The largest rotated figure
- The darkest rotated figure
- The smallest rotated figure
Correct answer: The reflected figure
Reflections cannot be achieved by rotation alone, making the reflected figure the odd one out.
Question 7: A 3×3 abstract matrix has a rule: shading moves one cell to the right per row, wrapping from column 3 back to column 1. Row 1 has shading in column 1. Which column is shaded in row 3?
- Column 3 (Correct answer)
- Column 1
- Column 2
- All columns
Correct answer: Column 3
Row 1 = column 1, row 2 = column 2, row 3 = column 3.
Plant Operator Selection System Test Plant Operator Selection System Abstract Pattern Recognition 5
In a series, each shape is divided into one more equal part than the previous.
Shape 1 is undivided, shape 2 is halved.
How many parts does shape 5 have?