Problem 8 · 2023 Math Kangaroo
Medium
Spatial & Visual Reasoning
spatial-reasoning
Daniel sticks these two pieces of paper onto a black circle. The two pieces of paper are not allowed to overlap. Which picture does he get? (Choose from pictures A–E.)
Show answer
Answer: E
Show hints
Hint 1 of 2
A half-circle covers half the black disc; a quarter-circle covers a quarter.
Still stuck? Show hint 2 →
Hint 2 of 2
Together they leave one quarter of the black circle still showing.
Show solution
Approach: cover a half and a quarter, leaving one black quarter
- The grey half-piece hides one half of the black circle.
- The white quarter-piece hides another quarter, and the pieces may not overlap.
- That leaves exactly one quarter black, matching picture E.
Mark:
· log in to save