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Non-verbal Reasoning · Question 19 of 65

After one fold and one punch, shown step by step in the figure, the paper is spread flat again.

Question 19

EasyOriginal question

After one fold and one punch, shown step by step in the figure, the paper is spread flat again. Pick the figure that matches it.

A square sheet, thought of as a 4 by 4 grid: the right half is folded over onto the left half. One hole is then punched through the folded sheet, in the square at (row, column) (1, 1) of the original sheet.
Options for question 19

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. Open the folds in reverse order. Opening a fold adds the mirror image of every hole across that fold line, because each hole went through both layers.

  2. Opening step 1 (the vertical fold) gives holes at (1, 1), (1, 4) (row, column).

  3. Figure 3 shows these 2 holes.

Worth noting

The folded sheet has 2 layers, so each punch makes 2 holes. A figure with fewer holes has left a fold closed; one with the right number in the wrong places has opened a fold about the wrong line.

Concept
Unfolding a punched sheet: reflect the holes across each fold line
Typical time
40 s
Your time
—
The rule this testsPaper folding and punching
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