Spatial Reasoning Math Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy

If you fold a square piece of paper in half and then in half again (both folds along the middle), how many layers of paper are there when unfolded? How many crease lines are visible?

Solution

1
Step 1: First fold doubles layers: $1 \to 2$ layers, creating $1$ crease.
2
Step 2: Second fold doubles again: $2 \to 4$ layers, creating another crease. Total $2$ creases.

Answer

4

layers;

2

crease lines.

Each fold doubles the number of layers. After

n

folds there are

2^n

layers. Two folds give

2^2 = 4

layers and leave

2

visible fold lines when unfolded.

About Spatial Reasoning

The cognitive ability to visualize, manipulate, and reason about two- and three-dimensional objects mentally in space.

Learn more about Spatial Reasoning →

More Spatial Reasoning Examples

Look at this sequence of shapes: triangle, square, pentagon. How many sides does the next shape have

Example 2 medium

A cube is painted red on all 6 faces and then cut into [formula] smaller equal cubes. How many small

Example 4 medium

A rectangular box is [formula] cm long, [formula] cm wide, and [formula] cm tall. What is the length

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