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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. # QOTD#22 67.345×1015 is equivalent to which of the following?  Question banks Downloads My Bookmarks Reviews Important topics
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Retired Moderator Joined: 07 Jun 2014
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GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
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QOTD#22 67.345×1015 is equivalent to which of the following? [#permalink]
Expert's post 00:00

Question Stats: 40% (00:35) correct 60% (00:53) wrong based on 10 sessions
$$67.345 * 10^{15}$$ is equivalent to which of the following?

Indicate all possible values.

A. $$6.7345 \times 1000^{13}$$

B. $$673.45 \times 10^{16}$$

C. $$6.7345 \times 10^{16}$$

D. $$67.345 \times 100^{14}$$

E. $$0.0067345 \times 10^{18}$$

Drill 4
Question: 5
Page: 321-322
[Reveal] Spoiler: OA

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Sandy
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Retired Moderator Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 175

Kudos [?]: 3036 , given: 394

Re: QOTD#22 67.345×1015 is equivalent to which of the following? [#permalink]
Expert's post
Explanation

To solve this question, remember that for every space the decimal in the base number moves to right, the power of ten should decrease by 1, and vice versa.

For choice (A), $$1000^{13} = 10^{15}$$, so the decimal should not have moved.

In choice (B), moving the decimal 1 space to the right means that $$10^{15}$$ should decrease by 1 to become $$10^{14}$$.

Eliminate choices (A) and (B).

For choice (C), moving the decimal 1 space to the left means that the power should increase by 1; this is correct.

For choice (D), $$100^{14}$$ is equivalent to $$10^{15}$$, so this is correct.

For choice (E), moving the decimal 4 spaces to the left means that the power should increase by 4; this is not correct.

The correct answers are (C), (D).
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Re: QOTD#22 67.345×1015 is equivalent to which of the following? [#permalink]
1
KUDOS
E is incorrect, I was confused when I looked at the answer but confirmed it is wrong by plugging the values into wolframalpha and getting 10 instead of 1.
Retired Moderator Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 175

Kudos [?]: 3036 , given: 394

Re: QOTD#22 67.345×1015 is equivalent to which of the following? [#permalink]
Expert's post
jezzsk8 wrote:
E is incorrect, I was confused when I looked at the answer but confirmed it is wrong by plugging the values into wolframalpha and getting 10 instead of 1.

You are correct option E is wrong. Corrected!
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Sandy
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Re: QOTD#22 67.345×1015 is equivalent to which of the following? [#permalink]
sandy wrote:
$$67.345 * 10^{15}$$ is equivalent to which of the following?
Indicate all possible values.
A. $$6.7345 \times 1000^{13}$$
B. $$673.45 \times 10^{16}$$
C. $$6.7345 \times 10^{16}$$
D. $$67.345 \times 100^{14}$$
E. $$0.0067345 \times 10^{18}$$

C, D

Drill 4
Question: 5
Page: 321-322

Option D is $$67.345 * 100^1^4$$= $$67.345 * 10^2^8$$. which is different from $$67.345 * 10^1^5$$
I believe option D should not be the correct ans
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Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos Re: QOTD#22 67.345×1015 is equivalent to which of the following?   [#permalink] 11 Sep 2018, 07:54
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