NNAT3 Level C flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Missing cell rule

In a grid completion item, the missing cell must satisfy the row pattern, the column pattern, and the overall grid pattern at the same time.

Constant count rule

Each row or column of a grid contains the same number of a given shape, so the missing cell supplies whatever count is short.

Rotation in grids

A shape in the missing cell often equals an adjacent shape rotated by 90 or 180 degrees, so track one corner to confirm.

Fill alternation

Black, white, and gray fills in a grid commonly alternate or invert along each row; check fill pattern before shape details.

Mirror symmetry completion

If the finished grid must be symmetric about a center line, the missing cell equals the mirror image of the cell opposite it.

Option elimination order

Test answer choices against the row rule, then the column rule, then the global count; most wrong options fail the first test.

Analogy direction rule

In A is to B as C is to ?, the transformation runs from A to B and must be applied in that same direction to C.

Transformation checklist

Compare A and B for size, rotation angle, reflection, color inversion, added or removed parts, and changes in element count.

Compound transformation

When A to B changes two properties at once, such as shrinking and inverting color, the correct answer must show both changes.

Reverse verification

Apply the inverse transformation to your chosen answer; if it does not reproduce C exactly, the choice is wrong.

Rotation direction trap

If A to B turns clockwise, a counterclockwise answer choice is incorrect even when its angle matches the required amount.

Added inner shape

When B contains an inner shape absent in A, the answer must contain that same inner shape in the same relative position.

Single-change distractor

Wrong analogy options typically apply only one of two required transformations, or apply the correct one in the wrong direction.

Constant step sequence

In a series, find the change between items 1 and 2, then confirm the same change holds between items 2 and 3.

Alternating series

Odd-positioned items follow one rule and even-positioned items follow another; analyze the two subsequences separately before predicting.

Rotation series angle

Note the angle turned per step, such as 45, 90, or 180 degrees, and the direction, then extend that turn to the next item.

Growth by fixed amount

Element counts may rise by a constant each step, as in 1, 2, 3, 4, or by the prior count, as in 1, 1, 2, 3, 5.

Moving dot path

A dot in a series often advances one cell per step along a fixed path, wrapping to the opposite edge when it reaches the border.

Cycle length rule

Repeating color or fill patterns have a cycle length, often 2 or 3; the answer's fill depends on position within that cycle.

Two-transition confirmation

A rule that explains only one transition in a series is unreliable; confirm it across at least two consecutive changes before answering.

Repeat-block series

Some series repeat a fixed block of items, such as 1, 2, 3, 1, 2, 3, so the next item equals the block position that follows.

Landmark feature rotation

To compare rotated figures, track one distinctive detail such as a notch or dot instead of trying to hold the whole shape in mind.

Chirality check

A mirrored figure cannot be produced by rotation alone; an asymmetric detail reveals whether a figure was flipped or turned.

Unfold in reverse

For paper-folding items, undo the folds from last to first, mirroring the hole pattern across each fold line as you go.

Fold doubling rule

Each fold doubles the number of holes a single punch produces, so two folds from one punch give four holes in the unfolded sheet.

Cube net opposite faces

In a cube net, faces separated by exactly one face in a straight line are opposite each other and never share an edge.

Cube orientation count

A cube has 24 distinct orientations, and any rotation preserves which faces are adjacent and which are opposite.

Transparent overlay

Combining two transparent shapes yields the union of their outlines plus darker shading wherever the shapes overlap.

Side-view projection

A side view of a block stack shows the tallest column at each position, not the total number of blocks in the stack.

Fold-line reflection

A punch through folded paper creates holes symmetric about every fold line, so hole positions mirror across each crease.

Net edge matching

When folding a net, edges that meet at a corner must have equal length; unequal matching edges signal an invalid net.

Same-shape different-orientation

Two figures are the same shape if one can be rotated onto the other without flipping; mirrored versions count as different.