Mensa IQ Spatial and Abstract Reasoning Flashcards

Which letter continues the series: A, C, F, J, O, ...?

Answer: U

The gaps grow by one each step (+2,+3,+4,+5,+6), so O+6 letters is U.

A square sheet is rotated 45 degrees. What new overall shape does its silhouette most resemble?

Answer: A diamond (rhombus orientation)

A square tilted 45 degrees presents as a diamond standing on one corner.

How many triangles are in a single large triangle divided by lines into four equal smaller triangles?

Answer: 5

There are four small triangles plus the one large outer triangle, totaling five.

Which 3D solid has exactly one curved surface and one flat circular face... actually two: which has one flat face and one curved surface?

Answer: Cone

A cone has a single circular flat base and one continuous curved surface.

In the matrix where each row adds a dot, row 1 has 1 dot and row 2 has 3 dots, how many dots are in row 3?

Answer: 5

Dots increase by two per row (1, 3, 5), so row 3 has five.

Which figure is the odd one out: arrow pointing up, arrow pointing down, arrow pointing left, plus sign?

Answer: Plus sign

The plus sign has no directional point, unlike the three arrows.

If a 2D net of a triangular prism is folded, how many rectangular faces will the solid have?

Answer: 3

A triangular prism has three rectangular side faces and two triangular ends.