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 4
^{12}
and 5
^{23}
contain?
A. 12
B. 13
C. 23
D. 24
E. 35
The correct answer is choice D.
We can rewrite the given numbers as 2
^{24}
* 5
^{23}
.
i.e., 2 * 2
^{23}
* 5
^{23}
= 2 * 10
^{23}
.
This is a 24 digit number.
Labels:
GMAT Number Properties
,
indices
,
powers
,
unit digts