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Sub 505 Level|   Arithmetic|               
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fiendex
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(90-8(20:4))/(1/2) 07 Feb 2012, 02:59
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

91% (00:35) correct 9% (00:50) wrong based on 1310 sessions

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Date
Time
Result
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\(\frac{90-8(20:4)}{\frac{1}{2}}\)

A) 25
B) 50
C) 100
D) 116
E) 170
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C
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(90-8(20:4))/(1/2) 07 Feb 2012, 03:05
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= (90 - 2*20)/(1/2)
= 50 * 2
= 100

Option (C)
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liko21
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(90-8(20:4))/(1/2) 03 Apr 2012, 06:21
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step one: 20/4=5
step two: 8*5=40
step three:90-40=50

step four:option A (retain the fraction)=50/(1/2)=>(50/1)/(1/2)=>100/1=>100

option B (transform fraction to decimal)=1/2=0.5 so we have...50/0,5=>500/5=>100

:-D
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(90-8(20:4))/(1/2) 03 Apr 2012, 06:55
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fiendex
\((90-8(20:4))/(1/2)\)

A) 25
B) 50
C) 100
D) 116
E) 170
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...does : means division....?

i got confused there...but others have imagined or used : as \..... well if its \, then the answer is X
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(90-8(20:4))/(1/2) 03 Apr 2012, 07:02
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harshavmrg
fiendex
\((90-8(20:4))/(1/2)\)

A) 25
B) 50
C) 100
D) 116
E) 170

...does : means division....?

i got confused there...but others have imagined or used : as \..... well if its \, then the answer is X
Show more

yeah its ratio i.e. 20:4 =20/4

HTH
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(90-8(20:4))/(1/2) 12 Oct 2020, 05:07
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fiendex
\((90-8(20:4))/(1/2)\)

A) 25
B) 50
C) 100
D) 116
E) 170
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Solution:

Simplifying, we have:

(90 - 8(5)) x 2

50 x 2

100

Answer: C
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(90-8(20:4))/(1/2) 08 Jun 2021, 00:11
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Equation :

(90 -8(20:4))/(1/2)

= (90-8(5))*2
= (90- 40)*2
= 50*2
= 100
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(90-8(20:4))/(1/2) 08 Jun 2021, 04:41
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This is a simple question that tests your knowledge of the order of mathematical operations. For this, we use PEMDAS.

According to PEMDAS, we first evaluate the terms inside the parentheses followed by the other mathematical operations indicated by the other alphabets in the acronym.

(90 – 8 (20:4)). The term 20:4 is a ratio and therefore represents a quotient of two terms; so 20:4 can be replaced by 20/4 which is equal to 5.
Therefore, (90 – 8 (20:4)) = (90 – 8*5) = (90 – 40) = 50.

The original expression now reduces to \(\frac{50}{ (1/2)}\) which can be rewritten as 50 * \(\frac{2}{1}\) = 100.

The correct answer option is C.

Answer option A is a trap for people who are not careful in the last step – remember 50 * ½ =25 and \(\frac{50 }{ (1/2)} \) = 100.

Hope that helps!
Aravind B T
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(90-8(20:4))/(1/2) 23 Apr 2025, 08:57
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fiendex
\(\frac{90-8(20:4)}{\frac{1}{2}}\)

A) 25
B) 50
C) 100
D) 116
E) 170
Show more
Because
20:4 = 5

so numerator will be 90 - 8(5) =50

now (50)/(1/2) =100
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