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Exponents Problem (m04q20)

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Intern
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Joined: 05 Sep 2012
Posts: 9
Location: Viet Nam
GMAT 1: 560 Q49 V19
GPA: 3.2
WE: Investment Banking (Investment Banking)
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Re: Exponents Problem (m04q20) [#permalink] New post 15 Oct 2013, 21:39
An easy question. Product of 2 and 5 has the last digit is 0 so E is the correct answer.
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Re: Exponents Problem (m04q20) [#permalink] New post 16 Oct 2013, 06:12
Answer: E

Solution: (2^15 * 3^15 * 5^15) * (2^7 * 7^1 * 5^1)= (2^15 * 3^15 * 5^15) * (5*7*128)=> no need to find the whole product of 2nd part = (2^15 * 3^15 * 5^15) * (XXXX0) => considering that the number ends with zero product will end with zero.
Re: Exponents Problem (m04q20)   [#permalink] 16 Oct 2013, 06:12

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Exponents Problem (m04q20)

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