LSAT 117 | Section 2 | Logical Reasoning: Q17

LR Question 17 Explanation

QUESTION TEXT: The tiny hummingbird weighs little …

QUESTION TYPE: Principle

FACTS: A hummingbird is tiny, but its egg is 15% of its adult body weight
A goose is much bigger than a hummingbird, but its egg is only 4% of its adult body weight
An ostrich is much bigger than a goose, but its egg is only 1.6% of its adult body weight

ANALYSIS: From the facts, we can see a clear relationship: Larger birds have a smaller egg weight to body weight ratio than smaller birds.

So as the bird gets bigger, the egg becomes a smaller percentage of the adult bird’s weight.

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1. The stimulus says nothing about the ratio of volume to weight of eggs.
2. This is silly. Ostriches are much bigger, so it follows that their eggs would be much bigger and heavier than hummingbird eggs. The stimulus is about percentages, not actual size and weight.
3. CORRECT. This matches the pattern of larger bird = smaller egg to body weight ratio.
4. The stimulus says nothing about whether egg size affects adult size.
5. There’s no comparison of how much species vary in egg size vs. body size.