PMDC Verified Question 5 of 19
A library has four books on shelf A, 8 books on shelf B. Some books are removed from shelf B such that both shelves now have exactly the same number of books. How many books were removed from Shelf B?
A
2 books
B
3 books
C
4 books
D
6 books
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: 4 books
Concept: Quantitative Equalities.

Formula: \(\text{Removed} = \text{Initial Shelf B} - \text{Target Shelf A}\)

Solution:

  • \(\text{Removed} = 8 - 4 = 4\text{ books}\).


Why other options are incorrect:

Option A: Calculates the difference needed if books were transferred rather than simply removed.

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