IQ Brain Teaser #157
(1) Multiply 50 by 50 one thousand times. (2) Multiply 100 by 100 five hundred times. How many times would you have to multiply the result of (2) to get (1)?

One billion times
50 to the 10th power
25 by 25 five hundred times
100 by 100 one thousand times
2.5 to the 25th power
None of the above are correct

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