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(.05)(.25)/100 =?

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(.05)(.25)/100 =?  [#permalink]

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New post 30 May 2020, 04:10
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Question Stats:

85% (00:50) correct 15% (01:06) wrong based on 52 sessions

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\(\frac{(.05)(.25)}{100}\)

a) 0.000075
b) 0.000125
c) 0.075
d) 0.125
e) 0.75

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Re: (.05)(.25)/100 =?  [#permalink]

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New post 30 May 2020, 04:32
=> 0.05*0.25/100
=> 5*25/100*100*100
=> 1/8000
=> (1/8)*(1/1000)
=> (0.125)*1/1000
=> 0.000125

Answer is B

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Re: (.05)(.25)/100 =?  [#permalink]

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New post 30 May 2020, 05:00
B

(0.05) * (0.25) /100 ==> (5 * 10^ {-2}) * (25 * 10^ {-2}) * ( 10^ {-2})
==> 125 * 10^(-6) = 0.000125
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Re: (.05)(.25)/100 =?  [#permalink]

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New post 30 May 2020, 05:11
SajjadAhmad wrote:
\(\frac{(.05)(.25)}{100}\)

a) 0.000075
b) 0.000125
c) 0.075
d) 0.125
e) 0.75


\(\frac{(.05)(.25)}{100}\)=\(\frac{5*25}{100*100*100}\)

=\(\frac{125}{10^6}\)

To divide by a power of 10, simply move the decimal to the left the same number of places as the exponent

Hence decimal will move 6 places to the left
=0.000125

Answer: B
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Re: (.05)(.25)/100 =?  [#permalink]

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New post 30 May 2020, 07:19
SajjadAhmad wrote:
\(\frac{(.05)(.25)}{100}\)

a) 0.000075
b) 0.000125
c) 0.075
d) 0.125
e) 0.75


\(\frac{(.05)(.25)}{100}\)

= \(\frac{5*25}{100*100*100}\)

= \(\frac{125}{10^6}\)

Thus, there will be 6 digits after decimal point (.) , Among the given options (A) and (B) fits in perfectly but the Numberator matches option choice (B), Hence Answer must be (B)
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Re: (.05)(.25)/100 =?   [#permalink] 30 May 2020, 07:19

(.05)(.25)/100 =?

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