Question

Which option has all four parts, that belong to the disc shown on the left? 

• A. A
• B. B
• C. C
• D. D

Hint:

In division and arrangement problems, carefully compare each piece to determine which options contain all the required parts.

Answer 1

The Correct Option is A

Step 1: The disc is divided into parts, and each piece corresponds to a specific section.
Step 2: Identify which of the options contains all four pieces from the original disc.
Step 3: Option (A) correctly includes all the parts that belong to the disc.

Answer 2

This question tests whether you can check that four candidate pieces truly came from one original disc, rather than close look-alikes from a different one.

1. Option A: Every curved edge across these four pieces matches the same radius as the original disc. The four straight cut edges line up, so the pieces close back into one full circle with no gaps or overlap.
2. Option B: At least one piece here has a curved edge with a slightly different radius than the original disc. It would not sit flush against the disc's own boundary if placed back against it.
3. Option C: One or more of these pieces has a straight edge cut at a different angle than the original disc's slices. The four pieces would leave a gap or an overlap if reassembled.
4. Option D: This set mixes in a piece whose curved edge belongs to a differently sized circle. It stands out once you compare curvature against the other three genuine pieces.

Checking curvature radius and cut angle across all four pieces shows only option A is fully consistent with the original disc.

the correct answer is Option A.