GMAT PS QOTW : Number Properties

This question is an interesting Problem Solving question from the topic number properties.

How many digits does the product of 412 and 523 contain?
A. 12
B. 13
C. 23
D. 24
E. 35

The correct answer is choice D.

We can rewrite the given numbers as 224 * 523.
i.e., 2 * 223 * 523
= 2 * 1023.
This is a 24 digit number.

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