Spatial Reasoning Flashcards

If you view a clock from behind its face (looking through the back), in which direction do the hands appear to rotate?

Answer: Anti-clockwise

Viewing the clock from the back reverses left and right, making the hands appear to move anti-clockwise.

How many edges does a cube have?

Answer: 12

A cube has 4 edges on the top face, 4 on the bottom face, and 4 vertical edges connecting them, totalling 12.

A soldier marches 5 km North, 3 km East, then 5 km South. How far are they from their starting point?

Answer: 3 km

The 5 km North and 5 km South cancel out, leaving the soldier exactly 3 km East of the start.

A square's corners are labeled 1 (top-left), 2 (top-right), 3 (bottom-right), 4 (bottom-left). After a 90° clockwise rotation, where is corner 1?

Answer: Top-right

A 90° clockwise rotation moves the top-left corner to the top-right position.

A piece of paper is folded in half three times, and a hole is punched through all layers at the center. When fully unfolded, how many holes are there?

Answer: 8

Each fold doubles the number of holes produced: 1 → 2 → 4 → 8 holes after three folds.

Which of the following 3D shapes has the greatest number of faces?

Answer: Cube

A tetrahedron has 4 faces, a triangular prism has 5, a square pyramid has 5, and a cube has 6 faces — the most.

A periscope uses two mirrors angled at 45°. An observer looks through the bottom eyepiece. In which direction relative to the observer must an object be located for it to be visible?

Answer: Directly above

A periscope redirects light from above downward through the instrument, allowing the observer to see objects directly above them.