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A flat postcard held at one corner cannot hold a book because it is:

AVery heavy
BToo shiny
CQuite warm
DWeak flat
Answer & Solution
Correct answer: D. Weak flat
1. A flat card bends under any weight. 2. It folds instead of holding. 3. So it is weak when flat. _Source: syllabus Mathematics Class II, Chapter 1, What is Long, What is Round._
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